v6.0.0-rc.9

What's Changed

• perf(http2): significantly improve http2 multi-core performance by @0x676e67 in #892
• build(deps): bump actions/checkout from 3 to 5 by @dependabot[bot] in #893
• chore(ci): speed up tests with feature matrix in GitHub Actions by @0x676e67 in #894
• feat(cookie): improve cookie_provider for better ergonomics and flexibility by @0x676e67 in #895
• feat(response): preserve URL when converting Response to http::Response by @0x676e67 in #897
• perf(http1): write during header sorting by @0x676e67 in #899
• feat(proxy): add Unix socket proxy support by @0x676e67 in #900
• build(deps): minimize out-of-the-box dependencies by @0x676e67 in #902
• feat(lib): add shortcut request methods by @0x676e67 in #903
• refactor(connect): safely convert socket2::Socket to Tokio TcpSocket by @0x676e67 in #904
• refactor(h2): refactor legacy unsafe wrapper code by @0x676e67 in #905
• refactor(io): use Pin::as_deref_mut() from std instead of custom polyfill by @0x676e67 in #906
• build(deps): bump actions/checkout from 4 to 5 by @dependabot[bot] in #908
• refactor(core): Replace Tokio I/O abstraction by @0x676e67 in #909
• chore(deps): replace base64 with boring2::base64 by @0x676e67 in #910
• feat(ws): remove Utf8Bytes::from_bytes_unchecked, unsafe UTF-8 by @0x676e67 in #912
• feat(dns): export IntoResolve as public API by @0x676e67 in #913
• refactor(deps): remove dependency on url::Url by @0x676e67 in #914
• feat(redirect): allow custom redirects to access response headers by @0x676e67 in #916
• feat(redirect): support accessing redirect history in response by @0x676e67 in #917

Full Changelog: v6.0.0-rc.8...v6.0.0-rc.9