Merge branch 'master' into greenkeeper/webpack-cli-3.0.8

Author: philwareham

package.json

@@ -25,7 +25,7 @@
     "url": "https://github.com/textpattern/textpattern-default-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "8.6.0",
+    "autoprefixer": "8.6.3",
     "clean-webpack-plugin": "0.1.19",
     "copy-webpack-plugin": "4.5.1",
     "cross-env": "5.1.6",
@@ -39,7 +39,7 @@
     "stylelint-order": "0.8.1",
     "stylelint-scss": "3.1.0",
     "stylelint-webpack-plugin": "0.10.5",
-    "webpack": "4.11.1",
+    "webpack": "4.12.0",
     "webpack-cli": "3.0.8"
   },
   "browserslist": [