Update css-loader dev-dependency

Author: AlexKVal

package.json

@@ -53,7 +53,7 @@
     "child-process-promise": "^1.1.0",
     "codemirror": "^5.5.0",
     "colors": "^1.1.2",
-    "css-loader": "^0.15.6",
+    "css-loader": "^0.16.0",
     "es5-shim": "^4.1.10",
     "eslint": "^1.1.0",
     "eslint-config-defaults": "^4.0.1",