chore(release): prepare for publishing

[devolutionsbot]

🤖 New release

• sspi: 0.21.0 -> 0.21.1 (✓ API compatible changes)

Changelog

[0.21.1] - 2026-06-24

Features

• Add support for SECPKG_ATTR_NAMES (#676) (be6315d475)

• Generate dotnet bindings with csbindgen (#679) (07f280b930)

• Add keytab client credentials and standards-compliant SASL/GSSAPI acceptor support (#681) (d95f249622)

  Extends the sspi Kerberos implementation to interoperate with standards-compliant SASL/GSSAPI (RFC 4752 / RFC 4121) peers by adding keytab-backed client credentials, supporting integrity-only (unsealed) GSS_Wrap tokens, and allowing acceptors to validate tickets for multiple configured service principals.

Bug Fixes

• Ntlm: NTLM_SSP_NEGOTIATE_KEY_EXCH flag usage (#670) (a26a3692b0)

• Package list handling (#677) (ee75161bcd)

• Disable mechListMIC for NTLM guest logon in negotiate module (#680) (80bdedf387)

• Don't attempt to package tests during NuGet CI build (#683) (958d9e5900)

• Server side CresSSP + SPNEGO + NTLM (#689) (77c283167c)

• Read channel bindings on the client authenticate step (#695) (82741f6630)

Build

• Add arm64 iOS simulator NuGet RID (#693) (ab1c19f4a5)

• Advance RustCrypto pins to the current rc.18/rc.33/rc.10 cluster (#692) (095e3f341c)

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