chore(package): update @storybook/react to version 5.3.18

Closes #84

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "@storybook/addon-actions": "^5.3.18",
     "@storybook/addon-links": "^5.3.18",
     "@storybook/addon-storyshots": "^5.3.18",
-    "@storybook/react": "^4.0.0-alpha.2",
+    "@storybook/react": "^5.3.18",
     "@storybook/storybook-deployer": "^2.3.0",
     "aws-sdk": "^2.217.1",
     "babel-core": "^6.26.0",