v0.13.0

Added

• Add prune command to remove containers and images (#78)
• Add Sirupsen's logrus as default logger (#79)
• Use Go modules and Go v1.12.x (#80)

Fixed

• Use canonical image when pulling Docker images (#83)
• Fix tags command when no data is present (#81)

Breaking changes

• Use new tags for mdelapenya's Docker images (#82)