Fix build issue on macOS in github.com/docker/docker/pkg/term

[jamesjoshuahill]

Why

The current version of github.com/docker/docker/pkg/term is affected by a build issue on Darwin. This occurs when a Go module depends on a version of golang.org/x/sys more recent than 6fcdbc0, see moby/term#15.

Let's enable consumers of this module to build on Darwin with the latest version of golang.org/x/sys by updating the dependency.

What

• Update dependencies to use latest version of github.com/moby/term package. This requires upgrading the version of github.com/moby/moby to at least v20.10.0-beta1, which includes 8312004.
• Ensure make test succeeds.
• Run tests in CI.

Notes:

• github.com/docker/docker was renamed to github.com/moby/moby.
• github.com/docker/docker/pkg/term is deprecated. Use github.com/moby/term instead.
• The build issue was fixed by Use unix.Ioctl{Get,Set}Termios on all unix platforms moby/term#16.
• github.com/moby/moby removed usages of the deprecated github.com/docker/docker/pkg/term package in 8312004.

[jamesjoshuahill]

Upgrading moby/moby from v17.x -> v20.x is not trivial. Closing in favour of removing the dependency on this unmaintained package.

A workaround for consumers of this package is to pin golang/x/sys to the commit before the constants were removed: moby/term#15 (comment).