chore(package): update @storybook/react to version 5.3.15

Closes #18

Author: greenkeeper[bot]

examples/package.json

@@ -15,7 +15,7 @@
     "@storybook/addon-actions": "^5.3.15",
     "@storybook/addon-info": "^5.3.15",
     "@storybook/addon-options": "^5.3.15",
-    "@storybook/react": "^4.0.0-rc.1",
+    "@storybook/react": "^5.3.15",
     "@types/storybook__addon-actions": "^3.4.1",
     "@types/storybook__addon-info": "^3.4.2",
     "@types/storybook__react": "^4.0.0",