feat(cli): create log from different branch

[cdcabrera]

What's included

• docs(readme): breakdown common use scenario
• feat(cli): create log from different branch
• fix(parse): empty summary, message
• refactor(parse): explicit undefined instead of empty string

Notes

• adds the branch option feature. intended to let you run changelog without needing to sync your branch. it DOES NOT work against remotes (currently), this is expected
• breakout common scenario in docs

How to test

Coverage and basic unit test check

1. update the NPM packages with $ yarn
2. $ yarn test
3. confirm tests come back clean

Example

...

Updates issue/story

ongoing

[codecov-commenter]

Codecov Report

Merging #115 (b529bac) into main (9aabe71) will increase coverage by 0.13%.
The diff coverage is 100.00%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
+ Coverage   93.47%   93.61%   +0.13%     
==========================================
  Files           5        5              
  Lines         276      282       +6     
  Branches      109      113       +4     
==========================================
+ Hits          258      264       +6     
  Misses         17       17              
  Partials        1        1              

Files	Coverage Δ
src/cmds.js	96.29% <100.00%> (+0.14%)	⬆️
src/parse.js	96.90% <100.00%> (+0.09%)	⬆️

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