chore: upgrade to typescript@4 (#650)

Closes #646

Author: G-Rath

package.json

@@ -120,7 +120,7 @@
     "rimraf": "^3.0.0",
     "semantic-release": "^17.0.7",
     "ts-node": "^9.0.0",
-    "typescript": "^3.5.3"
+    "typescript": "^4.0.0"
   },
   "peerDependencies": {
     "eslint": ">=5"

src/rules/no-focused-tests.ts

@@ -30,6 +30,7 @@ const isConcurrentExpression = (
 
 const matchesTestFunction = (object: TSESTree.LeftHandSideExpression) =>
   'name' in object &&
+  typeof object.name === 'string' &&
   (object.name in TestCaseName || object.name in DescribeAlias);
 
 const isCallToFocusedTestFunction = (object: TSESTree.Identifier) =>

yarn.lock

@@ -8538,10 +8538,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.5.3:
-  version "3.9.7"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
-  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
+typescript@^4.0.0:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
+  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
 
 uglify-js@^3.1.4:
   version "3.10.3"