This release has numerous bug and performance fixes:
https://github.com/puma/puma/releases

Noteable changes:

* nakayoshi_fork has been removed (https://github.com/puma/puma/issues/2258).
With compaction disabled, it appears not to provide much gain.

* https://github.com/puma/puma/pull/3035 dropped the use of the `time`
gem in Puma, but our Puma JSON-formatter needs it.

Changelog: changed