Bump @storybook/html from 5.1.3 to 5.1.4 (#194)

Bumps [@storybook/html](https://github.com/storybookjs/storybook/tree/HEAD/app/html) from 5.1.3 to 5.1.4.
- [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/v5.1.4/app/html)

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