3.8.0

Release note

Signature updates

• Dir.mktmpdir (#2158)
• File.join (#2158)
• IO#each_line (#2151)
• Kernel#readlines (#2151)
• Ractor.store_if_absent (#2198)
• Update docs as of 2024-12-24, 16:13 JST (#2193)

Library changes

• Adjust capacity of location children (#2197)
• Should validate self-type on Proc (#2192)