diff --git a/.node-version b/.node-version
index dba04c1..65d83ce 100644
--- a/.node-version
+++ b/.node-version
@@ -1 +1 @@
-8.11.3
+12.14.0
diff --git a/package-lock.json b/package-lock.json
index 913fd28..5d87dfb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
       "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "acorn": "^3.0.4"
       },
       "dependencies": {
         "acorn": {
@@ -33,10 +33,10 @@
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
       "dev": true,
       "requires": {
-        "co": "4.6.0",
-        "fast-deep-equal": "1.1.0",
-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.3.1"
+        "co": "^4.6.0",
+        "fast-deep-equal": "^1.0.0",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.3.0"
       }
     },
     "ajv-keywords": {
@@ -69,7 +69,7 @@
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       "dev": true,
       "requires": {
-        "sprintf-js": "1.0.3"
+        "sprintf-js": "~1.0.2"
       }
     },
     "assertion-error": {
@@ -83,7 +83,7 @@
       "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
       "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
       "requires": {
-        "lodash": "4.17.11"
+        "lodash": "^4.14.0"
       }
     },
     "babel-code-frame": {
@@ -92,9 +92,9 @@
       "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
       },
       "dependencies": {
         "chalk": {
@@ -103,11 +103,11 @@
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
-            "ansi-styles": "2.2.1",
-            "escape-string-regexp": "1.0.5",
-            "has-ansi": "2.0.0",
-            "strip-ansi": "3.0.1",
-            "supports-color": "2.0.0"
+            "ansi-styles": "^2.2.1",
+            "escape-string-regexp": "^1.0.2",
+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
           }
         },
         "strip-ansi": {
@@ -116,7 +116,7 @@
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "dev": true,
           "requires": {
-            "ansi-regex": "2.1.1"
+            "ansi-regex": "^2.0.0"
           }
         }
       }
@@ -133,7 +133,7 @@
       "integrity": "sha1-wHshHHyVLsH479Uad+8NHTmQopI=",
       "dev": true,
       "requires": {
-        "balanced-match": "1.0.0",
+        "balanced-match": "^1.0.0",
         "concat-map": "0.0.1"
       }
     },
@@ -161,7 +161,7 @@
       "integrity": "sha1-lAhe9jWB7NPaqSREqP6U6CV3dR8=",
       "dev": true,
       "requires": {
-        "callsites": "0.2.0"
+        "callsites": "^0.2.0"
       }
     },
     "callsites": {
@@ -176,9 +176,9 @@
       "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
       "dev": true,
       "requires": {
-        "assertion-error": "1.0.2",
-        "deep-eql": "0.1.3",
-        "type-detect": "1.0.0"
+        "assertion-error": "^1.0.1",
+        "deep-eql": "^0.1.3",
+        "type-detect": "^1.0.0"
       }
     },
     "chalk": {
@@ -187,9 +187,9 @@
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       "dev": true,
       "requires": {
-        "ansi-styles": "3.2.1",
-        "escape-string-regexp": "1.0.5",
-        "supports-color": "5.5.0"
+        "ansi-styles": "^3.2.1",
+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
       },
       "dependencies": {
         "ansi-styles": {
@@ -198,7 +198,7 @@
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           "dev": true,
           "requires": {
-            "color-convert": "1.9.3"
+            "color-convert": "^1.9.0"
           }
         },
         "supports-color": {
@@ -207,7 +207,7 @@
           "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
           "dev": true,
           "requires": {
-            "has-flag": "3.0.0"
+            "has-flag": "^3.0.0"
           }
         }
       }
@@ -230,7 +230,7 @@
       "integrity": "sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=",
       "dev": true,
       "requires": {
-        "restore-cursor": "2.0.0"
+        "restore-cursor": "^2.0.0"
       }
     },
     "cli-width": {
@@ -278,10 +278,10 @@
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       "dev": true,
       "requires": {
-        "buffer-from": "1.1.1",
-        "inherits": "2.0.3",
-        "readable-stream": "2.3.6",
-        "typedarray": "0.0.6"
+        "buffer-from": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^2.2.2",
+        "typedarray": "^0.0.6"
       }
     },
     "contains-path": {
@@ -302,9 +302,9 @@
       "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
       "dev": true,
       "requires": {
-        "lru-cache": "4.1.5",
-        "shebang-command": "1.2.0",
-        "which": "1.3.1"
+        "lru-cache": "^4.0.1",
+        "shebang-command": "^1.2.0",
+        "which": "^1.2.9"
       }
     },
     "debug": {
@@ -350,7 +350,7 @@
       "integrity": "sha512-35mSku4ZXK0vfCuHEDAwt55dg2jNajHZ1odvF+8SSr82EsZY4QmXfuWso8oEd8zRhVObSN18aM0CjSdoBX7zIw==",
       "dev": true,
       "requires": {
-        "esutils": "2.0.2"
+        "esutils": "^2.0.2"
       }
     },
     "error-ex": {
@@ -359,7 +359,7 @@
       "integrity": "sha1-+FWobOYa3E6GIcPNoh56dhLDqNw=",
       "dev": true,
       "requires": {
-        "is-arrayish": "0.2.1"
+        "is-arrayish": "^0.2.1"
       }
     },
     "escape-string-regexp": {
@@ -374,44 +374,44 @@
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       "dev": true,
       "requires": {
-        "ajv": "5.5.2",
-        "babel-code-frame": "6.26.0",
-        "chalk": "2.4.2",
-        "concat-stream": "1.6.2",
-        "cross-spawn": "5.1.0",
-        "debug": "3.1.0",
-        "doctrine": "2.1.0",
-        "eslint-scope": "3.7.3",
-        "eslint-visitor-keys": "1.1.0",
-        "espree": "3.5.4",
-        "esquery": "1.0.1",
-        "esutils": "2.0.2",
-        "file-entry-cache": "2.0.0",
-        "functional-red-black-tree": "1.0.1",
-        "glob": "7.1.2",
-        "globals": "11.12.0",
-        "ignore": "3.3.10",
-        "imurmurhash": "0.1.4",
-        "inquirer": "3.3.0",
-        "is-resolvable": "1.1.0",
-        "js-yaml": "3.13.1",
-        "json-stable-stringify-without-jsonify": "1.0.1",
-        "levn": "0.3.0",
-        "lodash": "4.17.11",
-        "minimatch": "3.0.4",
-        "mkdirp": "0.5.1",
-        "natural-compare": "1.4.0",
-        "optionator": "0.8.3",
-        "path-is-inside": "1.0.2",
-        "pluralize": "7.0.0",
-        "progress": "2.0.3",
-        "regexpp": "1.1.0",
-        "require-uncached": "1.0.3",
-        "semver": "5.4.1",
-        "strip-ansi": "4.0.0",
-        "strip-json-comments": "2.0.1",
+        "ajv": "^5.3.0",
+        "babel-code-frame": "^6.22.0",
+        "chalk": "^2.1.0",
+        "concat-stream": "^1.6.0",
+        "cross-spawn": "^5.1.0",
+        "debug": "^3.1.0",
+        "doctrine": "^2.1.0",
+        "eslint-scope": "^3.7.1",
+        "eslint-visitor-keys": "^1.0.0",
+        "espree": "^3.5.4",
+        "esquery": "^1.0.0",
+        "esutils": "^2.0.2",
+        "file-entry-cache": "^2.0.0",
+        "functional-red-black-tree": "^1.0.1",
+        "glob": "^7.1.2",
+        "globals": "^11.0.1",
+        "ignore": "^3.3.3",
+        "imurmurhash": "^0.1.4",
+        "inquirer": "^3.0.6",
+        "is-resolvable": "^1.0.0",
+        "js-yaml": "^3.9.1",
+        "json-stable-stringify-without-jsonify": "^1.0.1",
+        "levn": "^0.3.0",
+        "lodash": "^4.17.4",
+        "minimatch": "^3.0.2",
+        "mkdirp": "^0.5.1",
+        "natural-compare": "^1.4.0",
+        "optionator": "^0.8.2",
+        "path-is-inside": "^1.0.2",
+        "pluralize": "^7.0.0",
+        "progress": "^2.0.0",
+        "regexpp": "^1.0.1",
+        "require-uncached": "^1.0.3",
+        "semver": "^5.3.0",
+        "strip-ansi": "^4.0.0",
+        "strip-json-comments": "~2.0.1",
         "table": "4.0.2",
-        "text-table": "0.2.0"
+        "text-table": "~0.2.0"
       }
     },
     "eslint-config-airbnb-base": {
@@ -420,7 +420,7 @@
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       "dev": true,
       "requires": {
-        "eslint-restricted-globals": "0.1.1"
+        "eslint-restricted-globals": "^0.1.1"
       }
     },
     "eslint-config-transit": {
@@ -429,7 +429,7 @@
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       "dev": true,
       "requires": {
-        "eslint-config-airbnb-base": "11.3.2"
+        "eslint-config-airbnb-base": "^11.1.0"
       }
     },
     "eslint-import-resolver-node": {
@@ -438,8 +438,8 @@
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       "dev": true,
       "requires": {
-        "debug": "2.6.9",
-        "resolve": "1.5.0"
+        "debug": "^2.6.8",
+        "resolve": "^1.2.0"
       },
       "dependencies": {
         "debug": {
@@ -459,8 +459,8 @@
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       "dev": true,
       "requires": {
-        "debug": "2.6.9",
-        "pkg-dir": "1.0.0"
+        "debug": "^2.6.8",
+        "pkg-dir": "^1.0.0"
       },
       "dependencies": {
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@@ -480,16 +480,16 @@
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       "dev": true,
       "requires": {
-        "builtin-modules": "1.1.1",
-        "contains-path": "0.1.0",
-        "debug": "2.6.9",
+        "builtin-modules": "^1.1.1",
+        "contains-path": "^0.1.0",
+        "debug": "^2.6.8",
         "doctrine": "1.5.0",
-        "eslint-import-resolver-node": "0.3.1",
-        "eslint-module-utils": "2.1.1",
-        "has": "1.0.1",
-        "lodash.cond": "4.5.2",
-        "minimatch": "3.0.4",
-        "read-pkg-up": "2.0.0"
+        "eslint-import-resolver-node": "^0.3.1",
+        "eslint-module-utils": "^2.1.1",
+        "has": "^1.0.1",
+        "lodash.cond": "^4.3.0",
+        "minimatch": "^3.0.3",
+        "read-pkg-up": "^2.0.0"
       },
       "dependencies": {
         "debug": {
@@ -507,8 +507,8 @@
           "integrity": "sha1-N53Ocw9hZvds76TmcHoVmwLFpvo=",
           "dev": true,
           "requires": {
-            "esutils": "2.0.2",
-            "isarray": "1.0.0"
+            "esutils": "^2.0.2",
+            "isarray": "^1.0.0"
           }
         }
       }
@@ -525,8 +525,8 @@
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       "dev": true,
       "requires": {
-        "esrecurse": "4.2.1",
-        "estraverse": "4.3.0"
+        "esrecurse": "^4.1.0",
+        "estraverse": "^4.1.1"
       }
     },
     "eslint-visitor-keys": {
@@ -541,8 +541,8 @@
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       "dev": true,
       "requires": {
-        "acorn": "5.7.3",
-        "acorn-jsx": "3.0.1"
+        "acorn": "^5.5.0",
+        "acorn-jsx": "^3.0.0"
       }
     },
     "esprima": {
@@ -557,7 +557,7 @@
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       "dev": true,
       "requires": {
-        "estraverse": "4.3.0"
+        "estraverse": "^4.0.0"
       }
     },
     "esrecurse": {
@@ -566,7 +566,7 @@
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       "dev": true,
       "requires": {
-        "estraverse": "4.3.0"
+        "estraverse": "^4.1.0"
       }
     },
     "estraverse": {
@@ -587,9 +587,9 @@
       "integrity": "sha512-bSn6gvGxKt+b7+6TKEv1ZycHleA7aHhRHyAqJyp5pbUFuYYNIzpZnQDk7AsYckyWdEnTeAnay0aCy2aV6iTk9A==",
       "dev": true,
       "requires": {
-        "chardet": "0.4.2",
-        "iconv-lite": "0.4.24",
-        "tmp": "0.0.33"
+        "chardet": "^0.4.0",
+        "iconv-lite": "^0.4.17",
+        "tmp": "^0.0.33"
       }
     },
     "fast-deep-equal": {
@@ -616,7 +616,7 @@
       "integrity": "sha1-OrGi0qYsi/tDGgyUy3l6L84nyWI=",
       "dev": true,
       "requires": {
-        "escape-string-regexp": "1.0.5"
+        "escape-string-regexp": "^1.0.5"
       }
     },
     "file-entry-cache": {
@@ -625,8 +625,8 @@
       "integrity": "sha1-w5KZDD5oR4PYOLjISkXYoEhFg2E=",
       "dev": true,
       "requires": {
-        "flat-cache": "1.3.4",
-        "object-assign": "4.1.1"
+        "flat-cache": "^1.2.1",
+        "object-assign": "^4.0.1"
       }
     },
     "find-up": {
@@ -635,8 +635,8 @@
       "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
       "dev": true,
       "requires": {
-        "path-exists": "2.1.0",
-        "pinkie-promise": "2.0.1"
+        "path-exists": "^2.0.0",
+        "pinkie-promise": "^2.0.0"
       }
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     "flat-cache": {
@@ -645,10 +645,10 @@
       "integrity": "sha512-VwyB3Lkgacfik2vhqR4uv2rvebqmDvFu4jlN/C1RzWoJEo8I7z4Q404oiqYCkq41mni8EzQnm95emU9seckwtg==",
       "dev": true,
       "requires": {
-        "circular-json": "0.3.3",
-        "graceful-fs": "4.1.11",
-        "rimraf": "2.6.3",
-        "write": "0.2.1"
+        "circular-json": "^0.3.1",
+        "graceful-fs": "^4.1.2",
+        "rimraf": "~2.6.2",
+        "write": "^0.2.1"
       }
     },
     "fs-extra": {
@@ -656,9 +656,9 @@
       "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-5.0.0.tgz",
       "integrity": "sha512-66Pm4RYbjzdyeuqudYqhFiNBbCIuI9kgRqLPSHIlXHidW8NIQtVdkM1yeZ4lXwuhbTETv3EUGMNHAAw6hiundQ==",
       "requires": {
-        "graceful-fs": "4.1.11",
-        "jsonfile": "4.0.0",
-        "universalify": "0.1.1"
+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
       }
     },
     "fs.realpath": {
@@ -685,12 +685,12 @@
       "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
       "dev": true,
       "requires": {
-        "fs.realpath": "1.0.0",
-        "inflight": "1.0.6",
-        "inherits": "2.0.3",
-        "minimatch": "3.0.4",
-        "once": "1.4.0",
-        "path-is-absolute": "1.0.1"
+        "fs.realpath": "^1.0.0",
+        "inflight": "^1.0.4",
+        "inherits": "2",
+        "minimatch": "^3.0.4",
+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
       }
     },
     "globals": {
@@ -716,7 +716,7 @@
       "integrity": "sha1-hGFzP1OLCDfJNh45qauelwTcLyg=",
       "dev": true,
       "requires": {
-        "function-bind": "1.1.1"
+        "function-bind": "^1.0.2"
       }
     },
     "has-ansi": {
@@ -725,7 +725,7 @@
       "integrity": "sha1-NPUEnOHs3ysGSa8+8k5F7TVBbZE=",
       "dev": true,
       "requires": {
-        "ansi-regex": "2.1.1"
+        "ansi-regex": "^2.0.0"
       }
     },
     "has-flag": {
@@ -752,7 +752,7 @@
       "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
       "dev": true,
       "requires": {
-        "safer-buffer": "2.1.2"
+        "safer-buffer": ">= 2.1.2 < 3"
       }
     },
     "ignore": {
@@ -773,8 +773,8 @@
       "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
       "dev": true,
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-        "figures": "2.0.0",
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-        "through": "2.3.8"
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@@ -817,7 +817,7 @@
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-        "esprima": "4.0.1"
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-        "type-check": "0.3.2"
+        "prelude-ls": "~1.1.2",
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-        "pify": "2.3.0",
-        "strip-bom": "3.0.0"
+        "graceful-fs": "^4.1.2",
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@@ -914,8 +914,8 @@
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-        "path-exists": "3.0.0"
+        "p-locate": "^2.0.0",
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@@ -927,9 +927,9 @@
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+      "version": "4.17.15",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
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@@ -943,8 +943,8 @@
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-        "yallist": "2.1.2"
+        "pseudomap": "^1.0.2",
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@@ -959,7 +959,7 @@
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@@ -1002,7 +1002,7 @@
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@@ -1030,10 +1030,10 @@
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-        "semver": "5.4.1",
-        "validate-npm-package-license": "3.0.1"
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@@ -1048,7 +1048,7 @@
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-        "wrappy": "1.0.2"
+        "wrappy": "1"
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@@ -1057,7 +1057,7 @@
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-        "prelude-ls": "1.1.2",
-        "type-check": "0.3.2",
-        "word-wrap": "1.2.3"
+        "deep-is": "~0.1.3",
+        "fast-levenshtein": "~2.0.6",
+        "levn": "~0.3.0",
+        "prelude-ls": "~1.1.2",
+        "type-check": "~0.3.2",
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@@ -1092,7 +1092,7 @@
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@@ -1106,7 +1106,7 @@
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       "dev": true,
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@@ -1115,7 +1115,7 @@
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       "dev": true,
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-        "pinkie-promise": "2.0.1"
+        "pinkie-promise": "^2.0.0"
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@@ -1142,7 +1142,7 @@
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       "dev": true,
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-        "pify": "2.3.0"
+        "pify": "^2.0.0"
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@@ -1163,7 +1163,7 @@
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       "dev": true,
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-        "pinkie": "2.0.4"
+        "pinkie": "^2.0.0"
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@@ -1172,7 +1172,7 @@
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       "dev": true,
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-        "find-up": "1.1.2"
+        "find-up": "^1.0.0"
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@@ -1211,9 +1211,9 @@
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-        "normalize-package-data": "2.4.0",
-        "path-type": "2.0.0"
+        "load-json-file": "^2.0.0",
+        "normalize-package-data": "^2.3.2",
+        "path-type": "^2.0.0"
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@@ -1222,8 +1222,8 @@
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       "dev": true,
       "requires": {
-        "find-up": "2.1.0",
-        "read-pkg": "2.0.0"
+        "find-up": "^2.0.0",
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@@ -1232,7 +1232,7 @@
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-            "locate-path": "2.0.0"
+            "locate-path": "^2.0.0"
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@@ -1243,13 +1243,13 @@
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-        "inherits": "2.0.3",
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-        "safe-buffer": "5.1.2",
-        "string_decoder": "1.1.1",
-        "util-deprecate": "1.0.2"
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
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@@ -1264,8 +1264,8 @@
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       "dev": true,
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-        "caller-path": "0.1.0",
-        "resolve-from": "1.0.1"
+        "caller-path": "^0.1.0",
+        "resolve-from": "^1.0.0"
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@@ -1274,7 +1274,7 @@
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       "dev": true,
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-        "path-parse": "1.0.5"
+        "path-parse": "^1.0.5"
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@@ -1289,8 +1289,8 @@
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       "dev": true,
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-        "onetime": "2.0.1",
-        "signal-exit": "3.0.2"
+        "onetime": "^2.0.0",
+        "signal-exit": "^3.0.2"
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@@ -1299,7 +1299,7 @@
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       "dev": true,
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-        "glob": "7.1.6"
+        "glob": "^7.1.3"
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@@ -1308,12 +1308,12 @@
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-            "fs.realpath": "1.0.0",
-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
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@@ -1324,7 +1324,7 @@
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       "dev": true,
       "requires": {
-        "is-promise": "2.1.0"
+        "is-promise": "^2.1.0"
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@@ -1339,7 +1339,7 @@
       "integrity": "sha1-dTuHqJoRyVRnxKwWJsTvxOBcZ74=",
       "dev": true,
       "requires": {
-        "rx-lite": "4.0.8"
+        "rx-lite": "*"
       }
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@@ -1366,7 +1366,7 @@
       "integrity": "sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=",
       "dev": true,
       "requires": {
-        "shebang-regex": "1.0.0"
+        "shebang-regex": "^1.0.0"
       }
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@@ -1387,7 +1387,7 @@
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       "dev": true,
       "requires": {
-        "is-fullwidth-code-point": "2.0.0"
+        "is-fullwidth-code-point": "^2.0.0"
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@@ -1396,7 +1396,7 @@
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       "dev": true,
       "requires": {
-        "spdx-license-ids": "1.2.2"
+        "spdx-license-ids": "^1.0.2"
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@@ -1423,8 +1423,8 @@
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-        "is-fullwidth-code-point": "2.0.0",
-        "strip-ansi": "4.0.0"
+        "is-fullwidth-code-point": "^2.0.0",
+        "strip-ansi": "^4.0.0"
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@@ -1433,7 +1433,7 @@
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       "dev": true,
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-        "safe-buffer": "5.1.2"
+        "safe-buffer": "~5.1.0"
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@@ -1442,7 +1442,7 @@
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       "dev": true,
       "requires": {
-        "ansi-regex": "3.0.0"
+        "ansi-regex": "^3.0.0"
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@@ -1477,12 +1477,12 @@
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       "dev": true,
       "requires": {
-        "ajv": "5.5.2",
-        "ajv-keywords": "2.1.1",
-        "chalk": "2.4.2",
-        "lodash": "4.17.11",
+        "ajv": "^5.2.3",
+        "ajv-keywords": "^2.1.0",
+        "chalk": "^2.1.0",
+        "lodash": "^4.17.4",
         "slice-ansi": "1.0.0",
-        "string-width": "2.1.1"
+        "string-width": "^2.1.1"
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@@ -1503,7 +1503,7 @@
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       "dev": true,
       "requires": {
-        "os-tmpdir": "1.0.2"
+        "os-tmpdir": "~1.0.2"
       }
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@@ -1512,7 +1512,7 @@
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       "dev": true,
       "requires": {
-        "prelude-ls": "1.1.2"
+        "prelude-ls": "~1.1.2"
       }
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@@ -1544,8 +1544,8 @@
       "integrity": "sha1-KAS6vnEq0zeUWaz74kdGqywwP7w=",
       "dev": true,
       "requires": {
-        "spdx-correct": "1.0.2",
-        "spdx-expression-parse": "1.0.4"
+        "spdx-correct": "~1.0.0",
+        "spdx-expression-parse": "~1.0.0"
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@@ -1554,7 +1554,7 @@
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       "dev": true,
       "requires": {
-        "isexe": "2.0.0"
+        "isexe": "^2.0.0"
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@@ -1575,7 +1575,7 @@
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       "dev": true,
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-        "mkdirp": "0.5.1"
+        "mkdirp": "^0.5.1"
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     "yallist": {
diff --git a/package.json b/package.json
index e0c9e7e..3623941 100644
--- a/package.json
+++ b/package.json
@@ -42,8 +42,5 @@
     "eslint-config-transit": "^1.0.3",
     "eslint-plugin-import": "^2.2.0",
     "mocha": "^5.2.0"
-  },
-  "engines": {
-    "node": "12.13.0"
   }
 }