feat(args): allow returning the bumped version

[nappa85]

Description

This PR adds a CLI command to simply return the bumped version, solves #361

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (c94cb6a) 44.29% compared to head (81254c7) 43.40%.

Files	Patch %	Lines
git-cliff/src/lib.rs	0.00%	16 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #362      +/-   ##
==========================================
- Coverage   44.29%   43.40%   -0.89%     
==========================================
  Files          13       13              
  Lines         630      643      +13     
==========================================
  Hits          279      279              
- Misses        351      364      +13     

Flag	Coverage Δ
unit-tests	43.40% <0.00%> (-0.89%)	⬇️

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[orhun]

Had some comments - please check 🐻

Can you also add fixture tests for testing the output?

[orhun]

Thanks for your contribution! 💖

[nappa85]

Thanks for your contribution! 💖

Thank you for your patience