feat: draft of the --empty parameter

[12rambau]

superceed #696

Description

First draft of a new feature. The idea is to grant the user the capability to run cz bump without prior commits. The reasons are described in the associated issue.

here we add an --empty parameter to the bump method
when this parameter is set and if no increment is find, a automatic "PATCH" is released.

I'll wait for your feedback before working on tests and documentation.

Checklist

• Add test cases to all the changes you introduce
• Run ./scripts/format and ./scripts/test locally to ensure this change passes linter check and test
• Test the changes on the local machine manually
• Update the documentation for the changes

Additional context

Fix #662

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.54%. Comparing base (120d514) to head (c71773a).
Report is 325 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #723      +/-   ##
==========================================
+ Coverage   97.33%   97.54%   +0.21%     
==========================================
  Files          42       55      +13     
  Lines        2104     2489     +385     
==========================================
+ Hits         2048     2428     +380     
- Misses         56       61       +5     

Flag	Coverage Δ
unittests	97.54% <100.00%> (+0.21%)	⬆️

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[woile]

LGTM 💪🏻 , needs tests though

[12rambau]

🍾 Nice to see that you approve the idea.

needs tests though

absolutely, I'll work on them this week (I hope)

[Lee-W]

LGTM. I recently happen to work on a project need such feature lol 🎉

[Lee-W]

@woile @noirbizarre, I picked this up and refactored it a bit. I changed the argument to --allow-no-commit. One weird thing that might happen is that one commit might have multiple versions. I'm not sure whether it would cause any issue

[12rambau]

thanks @Lee-W