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

Closes #15

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "@storybook/addon-links": "^3.4.2",
     "@storybook/addon-notes": "^3.4.2",
     "@storybook/addon-storyshots": "^3.4.2",
-    "@storybook/addons": "^3.4.2",
+    "@storybook/addons": "^4.0.6",
     "@storybook/react": "^3.4.2",
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.0",