Bump regexpu-core from 4.6.0 to 4.7.0 (#13606)

Bumps [regexpu-core](https://github.com/mathiasbynens/regexpu-core) from 4.6.0 to 4.7.0.
- [Release notes](https://github.com/mathiasbynens/regexpu-core/releases)
- [Commits](https://github.com/mathiasbynens/regexpu-core/compare/v4.6.0...v4.7.0

)

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