chore(package): update @storybook/react to version 4.0.6

Closes #108

Author: greenkeeper[bot]

package.json

@@ -77,7 +77,7 @@
   "devDependencies": {
     "@storybook/addon-actions": "^4.0.6",
     "@storybook/addon-links": "^4.0.6",
-    "@storybook/react": "^3.4.1",
+    "@storybook/react": "^4.0.6",
     "babel-eslint": "^9.0.0",
     "babel-plugin-root-import": "^6.0.0",
     "babel-plugin-styled-components": "^1.5.1",