Feature/use major versions

[fistach]

• a GitHub Issue was opened for this feature / bug.
• test coverage was added (Cucumber or Spock as appropriate).

Fixes #603

It partially resolves issues mentioned in the #603. I think the tests describe well the intention of this PR.

[FilipStachowiak-TomTom]

Please note that the tests are sensitive when it comes to item names. If you take existing tests and rename 'java' to 'elephant', some of them will fail.

[marc0der]

Hi @fistach, thank you for the immaculate PR!

It's a pity you didn't speak to me about the work you were about to embark on because the changes you made are in the legacy codebase. We are no longer developing this, and all the bash components will be dismantled soon. I'll add a clear section to the top of the README about this so that others don't get caught out in the future.

Another comment I had was that the changes were only for the use command, which would leave the CLI in an inconsistent state. If this works for use, it should also work for install and default.

I'm writing a new backend service for the new Rust CLI that will enable this behaviour out of the box for all the commands I mentioned above.

Update: Added this notice to the README

[fistach]

Hi Marco.
No problem.
But if I add the rest of changes, will you re-consider clicking the "release" button of this tool?