Features:

• Added validationError property to request - #2422
• add: route-level custom Error Handlers - #2427
• add routePath in onRoute hook - #2451
• feat: add hook onTimeout - #2457

Fixes:

• fix schema lock in #2463

Documentation:

• Update Routes.md - #2424
• Fix several broken links on website, clarify docs - #2434
• improve and expand docs around error handling - #2425
• docs: add logger option in async/await example - #2465

TypeScript:

• feat: make fastify() PromiseLike - #2428
• typings: add getSchema and getSchemas - #2441
• Improve server types - #2449

Internals:

• Move headers to be a getter on Request - #2426
• Refactor override - #2432
• Use fastify-warning for handling deprecation warnings #2354