- Added async callback warning for `fastify.listen` and refined build path handling.
- Fixed several bugs (linting error, payload type check, double hook execution, missing supportedMethods) and introduced performance tweaks (avoid optional chaining, cache regex).
- Updated extensive documentation and migrated numerous tests from tap to node:test.
v5.2.2
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Fix for two Fastify security advisories (GHSA‑w2qp‑rph6‑63g4 and GHSA‑3m5p‑2c4r‑xxw2).
Added per‑route logging for Google Cloud Functions and introduced `Reply.prototype.mediaType` for easier content‑type handling.
Fixed trailer state clearing when removing all trailers and corrected requestCompleted handling to use null instead of undefined.