chore(deps): update dependency typescript to v4.1.5

Author: renovate-bot

package.json

@@ -45,7 +45,7 @@
     "@types/node": "12.12.62",
     "tslint": "6.1.3",
     "tslint-config-prettier": "1.18.0",
-    "typescript": "4.0.3",
+    "typescript": "4.1.5",
     "typedoc": "0.19.2",
     "ts-jest": "26.4.0",
     "jest": "26.4.2",