chore: Use TypeScript 4.5 in bootstrapped userscript (#155)

We use TypeScript 4.5 to compile the package itself since #151 (v5.0.0), so it makes sense to use at least that version in the bootstrapped userscript as well.

I did `npm install --save-exact typescript@4.5` because it typically makes much more sense to specify an exact TypeScript version than to specify a version range.

Author: SimonAlling

bootstrap/package-lock.json

@@ -12,7 +12,7 @@
     "app-root-path": "^3.0.0",
     "rimraf": "^3.0.2",
     "ts-preferences": "^2.0.0",
-    "typescript": "^3.7.4",
+    "typescript": "4.5.5",
     "userscript-metadata": "^1.0.0",
     "userscripter": "5.0.0",
     "webpack": "^4.41.5",