v1.5.0

What's Changed

• Add a workflow to sync commits to ruby/ruby by @k0kubun in #67
• Bump required version by @nobu in #70
• Add ext/etc/depend by @hsbt in #101
• Etc.uname: Return "ARM64" on Windows ARM64 and drop Win9x branches by @hsbt in #102
• Count processors across all processor groups in Etc.nprocessors by @hsbt in #103
• Etc.uname: Report the actual Windows version by @hsbt in #104
• Remove the IRIX 4 libsun check from etc by @hsbt in #105
• Release ALLOCV buffer in Etc.confstr by @nobu in #106

Full Changelog: v1.4.6...v1.5.0