chore(deps): update dependency typescript to v4 (#857)

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

Author: renovate[bot]

package.json

@@ -133,7 +133,7 @@
     "simulant": "^0.2.2",
     "sinon": "^9.0.3",
     "sinon-chai": "^3.5.0",
-    "typescript": "^3.9.7",
+    "typescript": "^4.0.2",
     "webpack": "^4.44.1",
     "webpack-atoms": "^13.1.0",
     "webpack-cli": "^3.3.12"

yarn.lock

@@ -12312,11 +12312,16 @@ typescript-workspace-plugin@^2.0.1:
   resolved "https://registry.yarnpkg.com/typescript-workspace-plugin/-/typescript-workspace-plugin-2.0.1.tgz#3d88be1c35a7fdf2c0160c8cf569ca8993439a12"
   integrity sha512-xjIYNFlPIA7IWXvnOFJoAeHPbPJSo0AiQDCRJzaAp3+xZwz6maTgeRLB0oEHVtCqz4Q1CDN6U9kh/2z8sxdDBQ==
 
-typescript@^3.8.3, typescript@^3.9.7:
+typescript@^3.8.3:
   version "3.9.7"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
   integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
+typescript@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
+  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
+
 ua-parser-js@0.7.21:
   version "0.7.21"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.21.tgz#853cf9ce93f642f67174273cc34565ae6f308777"