Fix jumps of unstyled content and test freezes, credit to @simonihmig, fixes #44: include webpack to fix tests

Author: lolmaus

package.json

@@ -142,7 +142,8 @@
     "release-it-lerna-changelog": "^3.1.0",
     "sinon": "^11.1.1",
     "typedoc": "^0.21.5",
-    "typescript": "^4.3.4"
+    "typescript": "^4.3.4",
+    "webpack": "^5.70.0"
   },
   "engines": {
     "node": "10.* || >= 12"