Support TestFlight apps

[IlIllIl]

Problem(s) addressed

It would be even better if the TestFlight apps could be updated via the cli.

Proposed solution(s)

mas list
mas info
mas install
mas uninstall
mas open
mas home
mas outdated

Alternative solution(s)

No response

Additional context

No response

[rgoldberg]

@IlIllIl Thanks for submitting this.

I'll look into this in a bit; I'm working on general improvements that will facilitate new features. The changes will possibly even be useful for supporting TestFlight, depending on how TestFlight works.