v2.9.0

This release adds support for digital signature data objects in Dead Simple Signing Envelope (DSSE) format. This adds support for digital signatures that use non-PGP key material sources.

Specifically, the following APIs have been added:

• func OptSignWithSigner: use a signature.Signer as key material when calling NewSigner.
• func OptVerifyWithVerifier: use one or more signature.Verifier as key material when calling NewVerifier.
• func (VerifyResult) Keys: get the public key(s) used to verify a signature.

What's Changed

• Rename PGP test files by @tri-adam in #243
• DSSE support by @tri-adam in #228
• build(deps): bump github.com/sigstore/sigstore from 1.4.5 to 1.4.6 by @dependabot in #246
• Expose non-PGP digital signature support by @tri-adam in #245
• chore: bump node version by @tri-adam in #247

Full Changelog: v2.8.3...v2.9.0