Bump @babel/cli from 7.5.5 to 7.8.4

Bumps [@babel/cli](https://github.com/babel/babel) from 7.5.5 to 7.8.4.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v7.5.5...v7.8.4)

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