[pontos-release] Release the next patch version with --patch

[y0urself]

What:

• Make pontos easy to use: You can use --patch with pontos-release prepare to set the release_version to the next patch version

Why:

• Want to use this in automation

How:

Checklist:

• Tests
• CHANGELOG Entry
• Documentation

[codecov]

Codecov Report

Merging #131 (cdec389) into master (4b7d852) will decrease coverage by 0.13%.
The diff coverage is 81.81%.

@@            Coverage Diff             @@
##           master     #131      +/-   ##
==========================================
- Coverage   91.13%   91.00%   -0.14%     
==========================================
  Files          11       11              
  Lines         767      778      +11     
  Branches      109      111       +2     
==========================================
+ Hits          699      708       +9     
- Misses         45       46       +1     
- Partials       23       24       +1     

Impacted Files	Coverage Δ
pontos/release/release.py	92.76% <50.00%> (-1.16%)	⬇️
pontos/version/helper.py	80.95% <100.00%> (+3.80%)	⬆️

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