Update postcss to 4.0

Author: w0rm

README.md

@@ -66,6 +66,9 @@ return gulp.src('./src/*.css')
 
 ## Changelog
 
+* 4.0.0
+  * Updated PostCSS to 4.0
+
 * 3.0.0
   * Updated PostCSS to 3.0 and fixed tests
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gulp-postcss",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "PostCSS gulp plugin",
   "main": "index.js",
   "scripts": {
@@ -23,7 +23,7 @@
   "homepage": "https://github.com/w0rm/gulp-postcss",
   "dependencies": {
     "gulp-util": "^3.0.0",
-    "postcss": "^3.0.0",
+    "postcss": "^4.0.0",
     "through2": "^0.6.1",
     "vinyl-sourcemaps-apply": "^0.1.1"
   },