Bump typescript from 3.9.7 to 4.0.5

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 4.0.5.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.9.7...v4.0.5)

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

Author: dependabot[bot]

package-lock.json

@@ -43,6 +43,6 @@
     "js-yaml": "^3.14.0",
     "prettier": "2.0.5",
     "ts-jest": "^24.3.0",
-    "typescript": "^3.9.7"
+    "typescript": "^4.0.5"
   }
 }