feat(changelog): do not skip breaking changes if configured

[sbmueller]

Hi there! Trying to contribute to this project first-time.

Description

Trying to resolve #106 by option to protect breaking changes, even when matched by a skipping commit parser. The option protect_breaking_commits is introduced in the config.
Note that during testing, one caveat was discovered: If a commit is matched by one parser, it can't be matched by any other. That means if a breaking commit was prevented from being skipped, it won't become part of any other group. Maybe it is worth to think about allowing multiple parsers for commits in an hierarchical order?

Motivation and Context

Breaking changes are highly relevant for stakeholders, therefore should not be skipped in a changelog, even when matched by commit parsers.

Fixes #106

How Has This Been Tested?

Extended the test cases by breaking change commits. Added a usual breaking change commit and one that matches a skipped commit parser regex. The latter is not skipped even it matches a commit parser that has skip set to true, if protect_breaking_commits is true.

nightly-aarch64-apple-darwin / rustc 1.66.0-nightly (8ce3204af 2022-09-30)

Backward compatibility is provided.

Screenshots / Output (if appropriate):

See tests in src/changelog.rs

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 added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Base: 64.06% // Head: 64.46% // Increases project coverage by +0.41% 🎉

Coverage data is based on head (12e298b) compared to base (f9d4b88).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
+ Coverage   64.06%   64.46%   +0.41%     
==========================================
  Files          14       14              
  Lines         790      799       +9     
==========================================
+ Hits          506      515       +9     
  Misses        284      284              

Flag	Coverage Δ
unit-tests	64.46% <100.00%> (+0.41%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
git-cliff-core/src/config.rs	60.00% <ø> (ø)
git-cliff-core/src/commit.rs	94.98% <100.00%> (+0.12%)	⬆️
git-cliff-core/tests/integration_test.rs	100.00% <100.00%> (ø)
git-cliff/src/changelog.rs	71.86% <100.00%> (+0.70%)	⬆️

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[orhun]

LGTM! Just a few edits needed, see my comments 🐻

[orhun]

I added test fixtures for this PR in 4e61f30

[sbmueller]

Thanks @orhun for the review! I think I addressed everything now. Feel free to add more comments if unsure about something.

[orhun]

Great stuff, thanks for your contribution! 🐻