Bumps [regex](https://github.com/rust-lang/regex) from 1.0.2 to 1.0.4.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.0.2...1.0.4)

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