Update dependency copy-webpack-plugin to v5.1.2

Author: renovate-bot

package-lock.json

@@ -37,7 +37,7 @@
     "@types/node": "9.6.60",
     "blund": "1.0.0",
     "chalk": "2.4.2",
-    "copy-webpack-plugin": "5.1.1",
+    "copy-webpack-plugin": "5.1.2",
     "jest": "26.6.0",
     "jest-puppeteer": "4.4.0",
     "lerna": "3.20.2",