Commands test and troubleshoot both register the "t" alias

Being a relatively new command, test registers alias t which was already taken by the troubleshoot command.

One of them needs to be removed.

In v3.4.1, exercise t --help resolves to test.

Would you be willing to submit a PR? I would prefer t as a shortcut for test.

Done. See Fix dup alias "t", keep it for "test" only by muzimuzhi · Pull Request #1159 · exercism/cli · GitHub.