Fix not being able to tag without also committing

[petterroea]

Fixes #113

Please note: I have no experience with mercurial, and as such I do not know if mercurial would allow tagging without committing.

Tests are also updated and are all green.

[petterroea]

(I also tested that this PR causes my wanted behavior to appear by running the same command as in the issue again)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b8ea252) 93.06% compared to head (753c990) 93.04%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #114      +/-   ##
==========================================
- Coverage   93.06%   93.04%   -0.02%     
==========================================
  Files          19       19              
  Lines        1254     1251       -3     
  Branches      258      257       -1     
==========================================
- Hits         1167     1164       -3     
  Misses         58       58              
  Partials       29       29              

Flag	Coverage Δ
python-3.10	93.04% <100.00%> (-0.02%)	⬇️
python-3.11	93.04% <100.00%> (-0.02%)	⬇️
python-3.8	93.04% <100.00%> (-0.02%)	⬇️
python-3.9	93.04% <100.00%> (-0.02%)	⬇️

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