2.15.0.rc1: Ruby 3.4 support

Added

• Add support for Ruby 3.4.0-rc1 in precompiled, native gems.

Changed

• Provide separate precompiled, native gems for GNU and Musl.
• Require glibc 2.29+ for x86-linux-gnu and x86_64-linux-gnu (and recommend RubyGems 3.3.22+ and Bundler 2.3.21+).

Removed

• Drop support for Ruby versions older than 3.1 as they do not ship with a version of RubyGems new enough to handle the new Musl gems.

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SHA256 checksums:

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