Merge pull request #597 from textpattern/dependabot/npm_and_yarn/autoprefixer-9.8.6

Bump autoprefixer from 9.8.5 to 9.8.6

Author: philwareham

package.json

@@ -25,7 +25,7 @@
     "url": "https://github.com/textpattern/textpattern-default-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "9.8.5",
+    "autoprefixer": "9.8.6",
     "clean-webpack-plugin": "3.0.0",
     "copy-webpack-plugin": "6.0.3",
     "cross-env": "7.0.2",