build(deps): bump libv8 from 7.3.492.27.1 to 8.4.255.0
build(deps): bump libv8 from 7.3.492.27.1 to 8.4.255.0

Bumps [libv8](https://github.com/rubyjs/libv8) from 7.3.492.27.1 to 8.4.255.0.
- [Release notes](https://github.com/rubyjs/libv8/releases)
- [Changelog](https://github.com/rubyjs/libv8/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubyjs/libv8/compare/v7.3.492.27.1...v8.4.255.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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