Bump css-minimizer-webpack-plugin from 3.0.2 to 3.1.1 in /assets (#292)

Author: dependabot[bot]

assets/package-lock.json

@@ -24,7 +24,7 @@
     "babel-loader": "^8.2.3",
     "copy-webpack-plugin": "^9.0.1",
     "css-loader": "^6.4.0",
-    "css-minimizer-webpack-plugin": "^3.0.2",
+    "css-minimizer-webpack-plugin": "^3.1.1",
     "eslint": "^7.32.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^3.4.1",