fix(jest mock): Add stub for static content

Add styl to transform

Author: michaelw85

skeleton/jest/package.json

@@ -35,7 +35,7 @@
       "json"
     ],
     "transform": {
-      "^.+\\.(css|less|sass|scss|jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "jest-transform-stub",
+      "^.+\\.(css|less|sass|scss|styl|jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "jest-transform-stub",
       // @if feat.babel
       "^.+\\.js$": "babel-jest",
       // @endif