chore(deps): update dependency autoprefixer to v9.4.10 (#469)

Author: renovate[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "@wordpress/jest-preset-default": "3.0.3",
     "@wordpress/rich-text": "3.0.7",
     "@wordpress/scripts": "2.5.0",
-    "autoprefixer": "9.4.9",
+    "autoprefixer": "9.4.10",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.0.1",
     "babel-loader": "8.0.5",