➕ (dev): Add c8 for test coverage

Author: richardfrost

package-lock.json

@@ -72,6 +72,7 @@
     "@types/mocha": "^10.0.10",
     "addons-linter": "^7.14.0",
     "archiver": "^7.0.1",
+    "c8": "^10.1.3",
     "chai": "^5.2.0",
     "chokidar": "^4.0.3",
     "copy-webpack-plugin": "^13.0.0",