Bump cssnano from 9.1.1 to 9.3.2 (#1446)

Author: dependabot[bot]

package.json

@@ -11,7 +11,7 @@
   "devDependencies": {
     "autoprefixer": "^10.6.2",
     "css-loader": "^7.1.5",
-    "cssnano": "^9.1",
+    "cssnano": "^9.3",
     "mini-css-extract-plugin": "^2.10.2",
     "postcss": "^8.5",
     "postcss-loader": "^8.2.1",