fix(deps): update dependency ember-cli-typescript to v4

package.json

@@ -31,7 +31,7 @@
     "ember-auto-import": "^1.6.0",
     "ember-cli-babel": "^7.22.1",
     "ember-cli-htmlbars": "^5.3.1",
-    "ember-cli-typescript": "^3.1.4",
+    "ember-cli-typescript": "^4.0.0",
     "qs": "^6.9.4"
   },
   "devDependencies": {

yarn.lock

@@ -972,7 +972,7 @@
     "@babel/helper-plugin-utils" "^7.10.4"
     "@babel/plugin-syntax-nullish-coalescing-operator" "^7.8.0"
 
-"@babel/plugin-proposal-nullish-coalescing-operator@^7.4.4", "@babel/plugin-proposal-nullish-coalescing-operator@^7.8.3":
+"@babel/plugin-proposal-nullish-coalescing-operator@^7.8.3":
   version "7.8.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.8.3.tgz#e4572253fdeed65cddeecfdab3f928afeb2fd5d2"
   integrity sha512-TS9MlfzXpXKt6YYomudb/KU7nQI6/xnapG6in1uZxoxDghuSMZsPb6D2fyUwNYSAp4l1iR7QtFOjkqcRYcUsfw==
@@ -1072,7 +1072,7 @@
     "@babel/helper-skip-transparent-expression-wrappers" "^7.11.0"
     "@babel/plugin-syntax-optional-chaining" "^7.8.0"
 
-"@babel/plugin-proposal-optional-chaining@^7.6.0", "@babel/plugin-proposal-optional-chaining@^7.9.0":
+"@babel/plugin-proposal-optional-chaining@^7.9.0":
   version "7.9.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.9.0.tgz#31db16b154c39d6b8a645292472b98394c292a58"
   integrity sha512-NDn5tu3tcv4W30jNhmc2hyD5c56G6cXx4TesJubhxrJeCvuuMpttxr0OnNCqbZGhFjLrg+NIhxxC+BK5F6yS3w==
@@ -2063,15 +2063,6 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-typescript" "^7.2.0"
 
-"@babel/plugin-transform-typescript@~7.8.0":
-  version "7.8.7"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-typescript/-/plugin-transform-typescript-7.8.7.tgz#48bccff331108a7b3a28c3a4adc89e036dc3efda"
-  integrity sha512-7O0UsPQVNKqpHeHLpfvOG4uXmlw+MOxYvUv6Otc9uH5SYMIxvF6eBdjkWvC3f9G+VXe0RsNExyAQBeTRug/wqQ==
-  dependencies:
-    "@babel/helper-create-class-features-plugin" "^7.8.3"
-    "@babel/helper-plugin-utils" "^7.8.3"
-    "@babel/plugin-syntax-typescript" "^7.8.3"
-
 "@babel/plugin-transform-unicode-escapes@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-escapes/-/plugin-transform-unicode-escapes-7.10.1.tgz#add0f8483dab60570d9e03cecef6c023aa8c9940"
@@ -7156,25 +7147,21 @@ ember-cli-typescript@^2.0.2:
     stagehand "^1.0.0"
     walk-sync "^1.0.0"
 
-ember-cli-typescript@^3.1.4:
-  version "3.1.4"
-  resolved "https://registry.yarnpkg.com/ember-cli-typescript/-/ember-cli-typescript-3.1.4.tgz#21d6ccd670d1f2e34c9cce68c6e32c442f46806b"
-  integrity sha512-HJ73kL45OGRmIkPhBNFt31I1SGUvdZND+LCH21+qpq3pPlFpJG8GORyXpP+2ze8PbnITNLzwe5AwUrpyuRswdQ==
+ember-cli-typescript@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/ember-cli-typescript/-/ember-cli-typescript-4.0.0.tgz#690f0cd3d15f4a69ae6d89f25b70b5997ae59161"
+  integrity sha512-ZwnBbBJ0yAIKq4FVgNFkxfMwqJhw6PyT45Enp2RvWIgzgaYCId8brrSgg3tvVWWjA7N5hiT4Ilyz5jrQwrnU1Q==
   dependencies:
-    "@babel/plugin-proposal-nullish-coalescing-operator" "^7.4.4"
-    "@babel/plugin-proposal-optional-chaining" "^7.6.0"
-    "@babel/plugin-transform-typescript" "~7.8.0"
     ansi-to-html "^0.6.6"
     broccoli-stew "^3.0.0"
     debug "^4.0.0"
-    ember-cli-babel-plugin-helpers "^1.0.0"
-    execa "^3.0.0"
-    fs-extra "^8.0.0"
+    execa "^4.0.0"
+    fs-extra "^9.0.1"
     resolve "^1.5.0"
     rsvp "^4.8.1"
-    semver "^6.3.0"
+    semver "^7.3.2"
     stagehand "^1.0.0"
-    walk-sync "^2.0.0"
+    walk-sync "^2.2.0"
 
 ember-cli-uglify@^3.0.0:
   version "3.0.0"
@@ -7993,22 +7980,6 @@ execa@^2.0.0:
     signal-exit "^3.0.2"
     strip-final-newline "^2.0.0"
 
-execa@^3.0.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/execa/-/execa-3.4.0.tgz#c08ed4550ef65d858fac269ffc8572446f37eb89"
-  integrity sha512-r9vdGQk4bmCuK1yKQu1KTwcT2zwfWdbdaXfCtAh+5nU/4fSX+JAb7vZGvI5naJrQlvONrEB20jeruESI69530g==
-  dependencies:
-    cross-spawn "^7.0.0"
-    get-stream "^5.0.0"
-    human-signals "^1.1.1"
-    is-stream "^2.0.0"
-    merge-stream "^2.0.0"
-    npm-run-path "^4.0.0"
-    onetime "^5.1.0"
-    p-finally "^2.0.0"
-    signal-exit "^3.0.2"
-    strip-final-newline "^2.0.0"
-
 execa@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/execa/-/execa-4.0.0.tgz#7f37d6ec17f09e6b8fc53288611695b6d12b9daf"
@@ -8601,6 +8572,16 @@ fs-extra@^9.0.0:
     jsonfile "^6.0.1"
     universalify "^1.0.0"
 
+fs-extra@^9.0.1:
+  version "9.0.1"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-9.0.1.tgz#910da0062437ba4c39fedd863f1675ccfefcb9fc"
+  integrity sha512-h2iAoN838FqAFJY2/qVpzFXy+EBxfVE220PalAqQLDVsFOHLJrZvut5puAbCdNv6WJk+B8ihI+k0c7JK5erwqQ==
+  dependencies:
+    at-least-node "^1.0.0"
+    graceful-fs "^4.2.0"
+    jsonfile "^6.0.1"
+    universalify "^1.0.0"
+
 fs-merger@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/fs-merger/-/fs-merger-3.1.0.tgz#f30f74f6c70b2ff7333ec074f3d2f22298152f3b"