Merge pull request #1173 from textpattern/dependabot/npm_and_yarn/autoprefixer-10.4.22

Bump autoprefixer from 10.4.21 to 10.4.22

Author: petecooper

package.json

@@ -17,7 +17,7 @@
     "url": "https://github.com/textpattern/textpattern-jquery-ui-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "10.4.21",
+    "autoprefixer": "10.4.22",
     "clean-webpack-plugin": "4.0.0",
     "cross-env": "10.1.0",
     "css-loader": "7.1.2",