Patch release carrying the event-driven-await regression detector (#37),
lock-free SharedConnection via persistent_term (#36), CI lint/dialyzer/
startup-timeout fixes (#34), the Elixir 1.18 + 1.20-rc.6 matrix (#38), and
doc corrections (Wallaby attribution, version requirement, dep pin → ~> 0.4).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>