chore(deps): update dependency typescript to v4 (#119)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package.json

@@ -62,7 +62,7 @@
     "puppeteer": "^2.1.1",
     "shipjs": "^0.20.0",
     "ts-jest": "^26.0.0",
-    "typescript": "^3.9.7",
+    "typescript": "^4.0.0",
     "typescript-eslint-language-service": "^3.0.0",
     "vue": "^3.0.0-rc.5",
     "vue-loader": "^16.0.0-beta.4",

yarn.lock

@@ -8767,10 +8767,10 @@ typescript-eslint-language-service@^3.0.0:
   dependencies:
     read-pkg-up "^7.0.0"
 
-typescript@^3.9.7:
-  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 "3.9.1"