Hono 4.12.28 release notes

fix(serve-static): treat empty string content as found by @yusukebe in https://github.com/honojs/hono/pull/5062
docs(MIGRATION): fix req.raw.headers reference (property, not method) by @EduardF1 in https://github.com/honojs/hono/pull/5047
chore: don't publish *.tsbuildinfo by @yusukebe in https://github.com/honojs/hono/pull/5066
fix(utils/body,validator): normalize Content-Type media type for case-insensitive matching by @yusukebe in https://github.com/honojs/hono/pull/5067
fix: avoid circular dependency between body.ts and request.ts by @usualoma in https://github.com/honojs/hono/pull/5071
fix(bun): report the requested subprotocol on WSContext.protocol by @greymoth-jp in https://github.com/honojs/hono/pull/5059
chore: bump devDependencies by @yusukebe in https://github.com/honojs/hono/pull/5085
fix(aws-lambda): detect V2 events by request context, not rawPath alone by @VihaanAgarwal in https://github.com/honojs/hono/pull/5033
docs(context-storage): fix JSDoc by @yusukebe in https://github.com/honojs/hono/pull/5086

Full Changelog: https://github.com/honojs/hono/compare/v4.12.27...v4.12.28