⬆️ Update Node Sass to 3.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gulp-sass",
-  "version": "2.0.0-alpha.1",
+  "version": "2.0.0",
   "description": "Gulp plugin for sass",
   "main": "index.js",
   "scripts": {
@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "gulp-util": "^3.0",
-    "node-sass": "^3.0.0-beta.7",
+    "node-sass": "^3.0.0",
     "object-assign": "^2.0.0",
     "through2": "^0.6.3",
     "vinyl-sourcemaps-apply": "~0.1.1"