chore: updated grunt-sass

Author: christophwitzko

package.json

@@ -14,7 +14,7 @@
     "grunt-contrib-copy": "^0.7.0",
     "grunt-contrib-uglify": "^0.6.0",
     "grunt-contrib-watch": "^0.6.1",
-    "grunt-sass": "^0.18.1",
+    "grunt-sass": "^1.0.0",
     "grunt-string-replace": "^1.0.0",
     "time-grunt": "^1.0.0"
   },