v5.4.0

What's Changed

• update README.md to reflect that Ruby is no longer at 1.9.3 by @brandonzylstra in #768
• Use TruffleRuby release in CI by @eregon in #769
• Remove excessive check of message by @nobu in #770
• Update SnakeYAML-Engine to 3.0.1 by @headius in #781
• Revert "Update SnakeYAML-Engine to 3.0.1" by @headius in #785
• Clamp io_reader copy to the buffer libyaml provides by @hsbt in #795

New Contributors

• @brandonzylstra made their first contribution in #768

Full Changelog: v5.3.1...v5.4.0