feature: maps and hooks

[woile]

Detail

Add support for map and hooks

Checklist:

• Run "./script/lint" and "./script/test" locally to ensure this change passes linter check and test
• Add test cases to all the changes
• Test the changes on the local machine manually
• Update the documentation for the changes

[codecov]

Codecov Report

Merging #187 into master will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #187      +/-   ##
==========================================
+ Coverage   92.04%   92.14%   +0.09%     
==========================================
  Files          35       35              
  Lines         955      967      +12     
==========================================
+ Hits          879      891      +12     
  Misses         76       76              

Flag	Coverage Δ
#unittests	92.14% <100.00%> (+0.09%)	⬆️

Impacted Files	Coverage Δ
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/commands/changelog.py	91.78% <100.00%> (+1.01%)	⬆️
commitizen/commands/version.py	100.00% <100.00%> (ø)
commitizen/cz/base.py	96.77% <100.00%> (+0.34%)	⬆️
...en/cz/conventional_commits/conventional_commits.py	92.06% <100.00%> (+0.12%)	⬆️

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[Lee-W]

This feature looks amazing! Especially the changelog_hook!

[woile]

Addressed most of the suggestions, only one is missing

[woile]

If no more comments I'll merge it :D

[Lee-W]

Let's merge it 🎉