4.0.0

• Updated to support .NET 8 and Microsoft.IdentityModel v7.x
  • initial implementation of the new EdDsaSignatureProvider.Sign override requiring ReadOnlySpan<byte> calls into existing byte[] based Sign method
• EdDsa now implements AsymmetricAlgorithm
• Added new ExtendedJsonWebKeyConverter (contribution from @thomas-tran)
• Removed support support for .NET 6 and Microsoft.IdentityModel v6.x
• Removed JwtPayloadHandler used by obsolete Branca and PASETO libraries
• Removed obsolete Bouncy Castle constructors from EdDsaSecurityKey