Ver.2.5.9

What's Changed

• Bump MessagePack from 2.5.129 to 2.5.187 in /sandbox/GeneratorSandbox by @dependabot in #187
• Fix thread safe issue about console output by @AlanLiu90 in #189
• Fix HTML-sensitive characters (like '<' and '>') are escaped by @AlanLiu90 in #190

Full Changelog: 2.5.8...2.5.9