chore(deps-dev): bump @storybook/addons from 5.2.6 to 5.2.8

Bumps [@storybook/addons](https://github.com/storybookjs/storybook/tree/HEAD/lib/addons) from 5.2.6 to 5.2.8.
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v5.2.8/lib/addons)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -90,7 +90,7 @@
     "@storybook/addon-actions": "^5.2.6",
     "@storybook/addon-knobs": "^5.2.6",
     "@storybook/addon-links": "^5.2.8",
-    "@storybook/addons": "^5.2.6",
+    "@storybook/addons": "^5.2.8",
     "@storybook/react": "^5.2.8",
     "@svgr/cli": "^4.3.3",
     "@babel/core": "^7.7.7",