build(deps-dev): bump storybook-dark-mode from 0.4.1 to 0.6.1 (#1008)

Bumps [storybook-dark-mode](https://github.com/hipstersmoothie/storybook-dark-mode) from 0.4.1 to 0.6.1.
- [Release notes](https://github.com/hipstersmoothie/storybook-dark-mode/releases)
- [Changelog](https://github.com/hipstersmoothie/storybook-dark-mode/blob/master/CHANGELOG.md)
- [Commits](https://github.com/hipstersmoothie/storybook-dark-mode/compare/v0.4.1...v0.6.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

packages/storybook/package.json

@@ -22,6 +22,6 @@
     "@storybook/addon-storysource": "^5.3.18",
     "@storybook/addons": "^5.3.17",
     "@storybook/react": "^5.3.17",
-    "storybook-dark-mode": "^0.4.1"
+    "storybook-dark-mode": "^0.6.1"
   }
 }