v2.0.0-rc.4

What's Changed

• fix cycle tracker to manage homonym services by @ndeloof in #556
• add package.go file to use compose-go in docker cli by @glours in #560
• host list can be used to declare both IPv4 and IPv6 for same hostname by @ndeloof in #563
• introduce ability to register types for extensions by @ndeloof in #564
• bump x/exp and adjust slices.Sort by @ndeloof in #562
• enforce unicity after canonical transformation by @ndeloof in #565
• Restore ability to override an included resource in compose.override.yaml by @ndeloof in #559
• set default values to required attributes by @ndeloof in #558
• Fix relative path resolution when combining include+extends by @ndeloof in #553

Full Changelog: v2.0.0-rc.3...v2.0.0-rc.4