chore(deps-dev): Bump babel-preset-es2015 from 6.13.2 to 6.24.1

Bumps [babel-preset-es2015](https://github.com/babel/babel) from 6.13.2 to 6.24.1.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v6.13.2...v6.24.1)

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