✨ named submodules

[jeftadlvw]

Add a required name to each submodule configuration. This could help when specifying some behaviour.

[[submodule]]
  name = "foo"
  path = "path/to/repository"
  url = "https://url/to/repository"
  ref = "branch, tag or commit"

Now, you have a generic way of addressing the submodules for commands like remove and mabye later sync.