Bump @babel/runtime from 7.7.2 to 7.7.4

Bumps [@babel/runtime](https://github.com/babel/babel/tree/HEAD/packages/babel-runtime) from 7.7.2 to 7.7.4.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.7.4/packages/babel-runtime

)

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