v1.0.0

Skopeo 1.0 release

New features in this release
      skopeo login
      skopeo logout

. Update skopeo readme and man page
. Add links to configuration man pages
. Update docs/skopeo-sync.1.md
. Add skopeo Login from c/common
. Add skopeo login&logout
. Add Security Policy
. Add tests for using signatures with mirrors
. Update c/image for containers/image#912
. fix copy doc
. Use cobra in skopeo
. Fix TestCopyAtomicExtension
. Update containers/image to v5.4.4
. Bump github.com/containers/storage from 1.18.2 to 1.19.0
. v0.11.2 containers/common