Replace Autoprefixer Core with Autoprefixer

Autoprefixer Core 5.2.1 -> Autoprefixer 6.0.3 https://github.com/postcss/autoprefixer/releases/tag/6.0.0
Package autoprefixer-core is deprecated in favour of autoprefixer as part of the 6.0.0 release:
Packages autoprefixer and autoprefixer-core were merged in 6.0 release.
Autoprefixer 6.0.0 requires PostCSS 5.0.10 or greater
PostCSS 0.5.4 -> 0.6.0 https://github.com/nDmitry/grunt-postcss/compare/v0.5.4...v0.6.0

You will need to update your dev dependencies after this change.

Props netweb
See #34177



git-svn-id: https://develop.svn.wordpress.org/trunk@35332 602fd350-edb4-49c9-b593-d223f7449a82

Gruntfile.js

@@ -3,7 +3,7 @@ module.exports = function(grunt) {
 	var path = require('path'),
 		SOURCE_DIR = 'src/',
 		BUILD_DIR = 'build/',
-		autoprefixer = require('autoprefixer-core'),
+		autoprefixer = require('autoprefixer'),
 		mediaConfig = {},
 		mediaBuilds = ['audiovideo', 'grid', 'models', 'views'];
 

package.json

@@ -9,7 +9,7 @@
   "author": "The WordPress Contributors",
   "license": "GPL-2.0+",
   "devDependencies": {
-    "autoprefixer-core": "~5.2.1",
+    "autoprefixer": "~6.0.3",
     "grunt": "~0.4.5",
     "grunt-browserify": "~4.0.0",
     "grunt-contrib-clean": "~0.6.0",
@@ -26,7 +26,7 @@
     "grunt-jsvalidate": "~0.2.2",
     "grunt-legacy-util": "^0.2.0",
     "grunt-patch-wordpress": "~0.3.0",
-    "grunt-postcss": "~0.5.4",
+    "grunt-postcss": "~0.6.0",
     "grunt-rtlcss": "~1.6.0",
     "grunt-sass": "~1.0.0",
     "matchdep": "~0.3.0"