* bug: Use DSSE media types for artifactType
* Don't serialize DSSE extension if not present
* Update pkg/attestation/types.go
Co-authored-by: Joel Kamp <joel.kamp@docker.com>
* Don't error on no referrers
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Co-authored-by: Joel Kamp <joel.kamp@docker.com>
* Single attestation when creating VSA
* Create single layer images for referrers attestations
* Move mock to test package. Add artifacts test
* Add test for envelope detection
* Add tests for image/index saving
* Add mirror tests
* Remove AttestationImage field from AttestationManifest
* Update naming. strictReferers != laxReferrers
* Add specific test for SaveReferrers
* Use receivers for manifest functions
* Move SaveImage/SaveIndex from image-signing-verifier
* Ignore test fixtures in coverage
* Add AddImagesToIndex function
* Add support for separate attestation storage repo
* Move mapping file types and parsing to config package
* Change signature of Verify to take image/platform
* Separate Attestation Resolvers to their own files (registry, layout and referrers)
* Add support configuring referrers resolution style in mapping.yaml
* Add registry test
