Bump typescript from 3.9.7 to 4.0.2 (#44)

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 4.0.2.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.9.7...v4.0.2)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -40,7 +40,7 @@
     "mocha": "^8.1.1",
     "prettier": "^2.0.2",
     "pretty-quick": "^2.0.1",
-    "typescript": "^3.8.3",
+    "typescript": "^4.0.2",
     "typescript-temporary-fork-for-jsdoc": "^3.6.0-insiders.20190802"
   },
   "files": [