Update gts, eslint, typescript and hapi dependencies (#455)

Co-authored-by: Daniel Dyla <[email protected]>

Author: Flarna

package.json

@@ -59,7 +59,7 @@
     "rimraf": "3.0.2",
     "ts-loader": "8.0.12",
     "ts-mocha": "8.0.0",
-    "typescript": "4.1.3",
+    "typescript": "4.2.4",
     "webpack": "4.46.0"
   },
   "dependencies": {