chore(deps): update dependency karma-webpack to v5

Author: renovate-bot

Diff for: package.json

@@ -75,7 +75,7 @@
     "karma-coverage-istanbul-reporter": "3.0.3",
     "karma-mocha": "2.0.1",
     "karma-sourcemap-loader": "0.3.8",
-    "karma-webpack": "4.0.2",
+    "karma-webpack": "5.0.0",
     "lcov-total": "1.0.7",
     "live-server": "1.2.1",
     "lockfix": "2.0.0",