format version parts

[ichrysou]

Apply fix as suggested here:
c4urself/bump2version#141

[codecov]

Codecov Report

Merging #26 (ee43bdb) into master (173be1a) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
+ Coverage   92.10%   92.14%   +0.03%     
==========================================
  Files          15       15              
  Lines         963      967       +4     
  Branches      207      207              
==========================================
+ Hits          887      891       +4     
  Misses         48       48              
  Partials       28       28              

Flag	Coverage Δ
python-3.10	92.14% <100.00%> (+0.03%)	⬆️
python-3.11	92.14% <100.00%> (+0.03%)	⬆️
python-3.8	92.14% <100.00%> (+0.03%)	⬆️
python-3.9	92.14% <100.00%> (+0.03%)	⬆️

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Impacted Files	Coverage Δ
bumpversion/__init__.py	100.00% <100.00%> (ø)
bumpversion/version_part.py	88.43% <100.00%> (+0.32%)	⬆️

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[reindlt]

It seems that this fix was removed with some refactoring happened in #112. Tried with version 0.20.1 and the following config parameters:

current_version = "5.06.0"
parse = "(?P<major>\\d+)\\.(?P<minor>\\d+)\\.(?P<patch>\\d+)"
serialize = ["{major}.{minor:02}.{patch}"]
search = "{current_version}"
replace = "{new_version}"

Increasing minor would result in version 5.70.0 which is obviously wrong. Any chances we get this functionality back? Or is there any other possibility to have fixed length version numbers?