- 🔒 Security fix for invalid content‑type parsing that could bypass validation (CVE‑2025‑32442).
- 🔧 Migrated multiple test suites (logger options, custom parsers, stream, request logger) to the Node test runner.
- 👤 New contributor @ilteoood added several test migrations.
v5.3.1
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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.