Fix handling of versions when dev versions are used

[blink1073]

Fixes #340

[codecov-commenter]

Codecov Report

Merging #341 (4936e0d) into main (eb66cf8) will increase coverage by 0.21%.
The diff coverage is 96.96%.

@@            Coverage Diff             @@
##             main     #341      +/-   ##
==========================================
+ Coverage   83.85%   84.07%   +0.21%     
==========================================
  Files          19       19              
  Lines        2571     2593      +22     
  Branches      341      343       +2     
==========================================
+ Hits         2156     2180      +24     
+ Misses        296      294       -2     
  Partials      119      119              

Impacted Files	Coverage Δ
jupyter_releaser/actions/draft_release.py	0.00% <0.00%> (ø)
jupyter_releaser/changelog.py	86.42% <100.00%> (ø)
jupyter_releaser/cli.py	91.51% <100.00%> (+0.06%)	⬆️
jupyter_releaser/lib.py	82.51% <100.00%> (ø)
jupyter_releaser/tests/test_cli.py	99.06% <100.00%> (+<0.01%)	⬆️
jupyter_releaser/tests/test_functions.py	99.11% <100.00%> (+0.04%)	⬆️
jupyter_releaser/util.py	70.56% <100.00%> (+1.25%)	⬆️

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