v1.6.0

Pin by commit: uses: fredericrous/attest@cc1354c21f67be606153fc59ebe22ee5b1d691be # v1.6.0

What's Changed

• feat: git-attest becomes the one library by @fredericrous in #31
• fix: an unusable or unlisted spec signs no canonical tree by @fredericrous in #33
• chore(release): 1.6.0 by @fredericrous in #32

Full Changelog: v1.5.1...v1.6.0