Update dependency cpy-cli to v4.2.0

Author: renovate[bot]

webapp/package-lock.json

@@ -27,7 +27,7 @@
     "@browser-logos/uc": "1.1.0",
     "@polymer/test-fixture": "4.0.2",
     "babel-eslint": "10.1.0",
-    "cpy-cli": "4.1.0",
+    "cpy-cli": "4.2.0",
     "eslint": "7.32.0",
     "eslint-plugin-html": "7.1.0",
     "wct-browser-legacy": "1.0.2",