Update 'grunt-contrib-compress' to version 1.6.0 and the subdependency 'node-sass' to version 4.14.1

package.json

@@ -123,7 +123,7 @@
     "grunt-cli": "~0.1.13",
     "grunt-contrib-clean": "0.7.0",
     "grunt-contrib-compass": "1.0.4",
-    "grunt-contrib-compress": "1.4.3",
+    "grunt-contrib-compress": "^1.6.0",
     "grunt-contrib-concat": "1.0.1",
     "grunt-contrib-connect": "0.11.2",
     "grunt-contrib-copy": "0.8.1",