- Updated various documentation sections, including Vercel guide, ecosystem plugins, and error‑handler warnings
- Migrated numerous test files from tap to the built‑in node:test runner and added an ESLint rule to enforce no trailing commas
- Fixed JSON schema validation edge cases and corrected addHook error handling; bumped several dependencies (borp, fluent‑json‑schema, tsd)
v5.3.3
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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.