Merge pull request #1463 from textpattern/dependabot/npm_and_yarn/autoprefixer-10.5.4

Bump autoprefixer from 10.5.2 to 10.5.4

Author: petecooper

package.json

@@ -25,7 +25,7 @@
     "url": "https://github.com/textpattern/textpattern-default-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "10.5.2",
+    "autoprefixer": "10.5.4",
     "clean-webpack-plugin": "4.0.0",
     "copy-webpack-plugin": "14.0.0",
     "cross-env": "10.1.0",