gulp autoprefixer update

package.json

@@ -20,7 +20,6 @@
     "jekyll-watch": "jekyll build --watch",
     "jekyll-serve": "jekyll serve --livereload",
     "gh-pages": "./gh-pages.sh",
-
     "dist": "gulp build && JEKYLL_ENV=production jekyll build --destination dist",
     "publish-dist": "./gh-pages.sh",
     "watch": "gulp build && npm-run-all --parallel gulp-watch jekyll-watch",
@@ -37,7 +36,7 @@
   },
   "devDependencies": {
     "gulp": "^3.9.1",
-    "gulp-autoprefixer": "^4.0.0",
+    "gulp-autoprefixer": "^5.0.0",
     "gulp-rename": "^1.2.2",
     "gulp-sass": "^3.1.0",
     "npm-run-all": "^4.1.2"