BREAKING CHANGE: Update dependency assets-webpack-plugin to v7

Author: renovate[bot]

package.json

@@ -22,7 +22,7 @@
     "@babel/plugin-transform-runtime": "7.12.10",
     "@babel/preset-env": "7.12.10",
     "@babel/runtime": "7.12.5",
-    "assets-webpack-plugin": "3.9.12",
+    "assets-webpack-plugin": "7.1.1",
     "autoprefixer": "10.1.0",
     "babel-loader": "8.2.2",
     "babel-runtime": "6.26.0",