Update dependency typescript to v4.1.2

Author: renovate-bot

package.json

@@ -41,7 +41,7 @@
     "tslint": "6.1.3",
     "typedoc": "0.19.2",
     "typedoc-plugin-external-module-name": "4.0.3",
-    "typescript": "4.0.5"
+    "typescript": "4.1.2"
   },
   "dependencies": {
     "@types/urijs": "^1.19.10",