Merge pull request #10 from webdevian/greenkeeper/gulp-sass-4.0.0

Update gulp-sass to the latest version 🚀

Author: webdevian

package.json

@@ -29,7 +29,7 @@
     "gulp-load-plugins": "^1.1.0",
     "gulp-pug": "^3.3.0",
     "gulp-rename": "^1.2.2",
-    "gulp-sass": "^3.1.0",
+    "gulp-sass": "^4.0.0",
     "gulp-sass-error": "^1.0.4",
     "gulp-uglify": "^3.0.0",
     "gulp-util": "^3.0.8",