chore(package): update @types/node to version 14.0.0

Closes #7

Author: greenkeeper[bot]

Diff for: package.json

@@ -32,7 +32,7 @@
   "dependencies": {},
   "devDependencies": {
     "@types/jest": "^24.0.0",
-    "@types/node": "^10.12.10",
+    "@types/node": "^14.0.0",
     "coveralls": "^3.0.2",
     "jest": "^23.6.0",
     "prettier": "^1.14.3",