feat: add lint-semver-ranges command

[ArturWierzbicki]

Hey @JamieMason! First of all, thanks for creating this project - it's a great tool to have when dealing with monorepos.

Description (What)

I have added a lint-semver-ranges command, which works just like the existing fix-semver-ranges command, except that it simply outputs all the non-compliant dependency versions instead of fixing them.

Justification (Why)

My use case for this command is a project in which a) I cannot force everyone to use fix-semver-ranges before pushing the code (e.g., via a pre-commit hook), and b) the CI process can't commit changes to dependency versions

Of course, I could work around the limitations by failing the CI job if running fix-semver-ranges modifies any file, but adding a "lint" capability to the project looks like the cleanest solution.

How Can This Be Tested?

Command name: lint-semver-ranges:
https://github.com/ArturWierzbicki/syncpack/blob/82916f7248c025039d18d94181645b8758fc2381/package.json#L13

Example output:

I did two small refactors in order to reuse as much code from fix-semver-ranges as possible. Looking forward to your feedback!

[JamieMason]

This looks really good, great work and thanks a lot. I'm really busy due to my day job but I hope to pick this up this weekend.

[JamieMason]

Thanks again for this @ArturWierzbicki, this was released in 5.8.12 🎉