chore: prep 0.0.20 (#79)

Co-authored-by: Facundo Tuesca <facundo.tuesca@trailofbits.com>

Author: woodruffw

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.0.20]
+
+### Changed
+
+- Explicitly support sigstore-python 3.6
+  ([#79](https://github.com/trailofbits/pypi-attestations/pull/79))
+
 ## [0.0.19]
 
 This is a corrective release for [0.0.18].
@@ -205,7 +212,8 @@ This is a corrective release for [0.0.14].
 
 - Initial implementation
 
-[Unreleased]: https://github.com/trailofbits/pypi-attestation-models/compare/v0.0.19...HEAD
+[Unreleased]: https://github.com/trailofbits/pypi-attestation-models/compare/v0.0.20...HEAD
+[0.0.20]: https://github.com/trailofbits/pypi-attestation-models/compare/v0.0.19...v0.0.20
 [0.0.19]: https://github.com/trailofbits/pypi-attestation-models/compare/v0.0.18...v0.0.19
 [0.0.18]: https://github.com/trailofbits/pypi-attestation-models/compare/v0.0.17...v0.0.18
 [0.0.17]: https://github.com/trailofbits/pypi-attestation-models/compare/v0.0.16...v0.0.17

src/pypi_attestations/__init__.py

@@ -1,6 +1,6 @@
 """The `pypi-attestations` APIs."""
 
-__version__ = "0.0.19"
+__version__ = "0.0.20"
 
 from ._impl import (
     Attestation,