test(styled-components): Adding jest-styled-components to ensure the css classnames generated in jes

Author: rcdexta

package-lock.json

@@ -93,6 +93,7 @@
     "identity-obj-proxy": "^3.0.0",
     "jest": "^24.8.0",
     "jest-cli": "^24.8.0",
+    "jest-styled-components": "^6.3.3",
     "prettier": "1.14.3",
     "pretty-quick": "^1.7.0",
     "react": "^16.8.0",

package.json

@@ -1,4 +1,5 @@
 const initStoryshots = require('@storybook/addon-storyshots').default
+import 'jest-styled-components'
 initStoryshots({
   storyNameRegex: /^((?!.*?DontTest).)*$/
 })