- Breaking rename: Deno.WebSocketUpgrade.websocket is now socket (unstable)
- Added many new features including unsafe SSL ignore flag, experimental WebSocketStream API, FFI API, stabilized Deno.serveHttp, AbortSignal support in writeFile, client TLS certificates, structuredClone, REPL eval flag, and LSP refactori...
- Security improvements such as optional native cert loading and client certificate support, plus bug fixes for Windows import‑map file specifiers, proper Error subclassing, Origin header in fetch, and WebSocket close codes
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