v6.0.0

What's Changed

• 16 eol by @ronag in #2480
• update spec & wpts by @KhafraDev in #2482
• version cleanup by @KhafraDev in #2483
• perf: avoid Response initialization by @tsctx in #2489
• perf: optimize parseHeaders by @tsctx in #2492
• chore: fix typo by @tsctx in #2490
• feat: print attempted addresses on ConnectTimeoutError by @fengmk2 in #2494
• Expose HTTP errors that are not meant to be retried by @MzUgM in #2496

Full Changelog: v5.28.2...v6.0.0