Update dependency postcss-cli to v11

Author: renovate[bot]

package.json

@@ -27,7 +27,7 @@
     "gulp-purgecss": "5.0.0",
     "gulp-sass": "5.1.0",
     "postcss": "8.4.31",
-    "postcss-cli": "10.1.0",
+    "postcss-cli": "11.0.0",
     "prejss-cli": "0.3.3",
     "rollup": "4.5.2",
     "sass": "1.69.5",