Take a common ancestor if closest not available to shorten paths.

[tobiasraabe]

Closes #75.

[codecov]

Codecov Report

Merging #76 (21a5ff4) into main (d7903e9) will increase coverage by 0.05%.
The diff coverage is 97.61%.

❗ Current head 21a5ff4 differs from pull request most recent head 456f5b1. Consider uploading reports for the commit 456f5b1 to get more accurate results

@@            Coverage Diff             @@
##             main      #76      +/-   ##
==========================================
+ Coverage   90.17%   90.23%   +0.05%     
==========================================
  Files          55       57       +2     
  Lines        4652     4700      +48     
==========================================
+ Hits         4195     4241      +46     
- Misses        457      459       +2     

Flag	Coverage Δ
end_to_end	76.25% <82.14%> (+0.11%)	⬆️
integration	41.76% <69.04%> (+0.17%)	⬆️
unit	68.12% <79.76%> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
tests/test_nodes.py	93.49% <ø> (-0.63%)	⬇️
src/_pytask/nodes.py	97.51% <81.81%> (-1.31%)	⬇️
src/_pytask/path.py	100.00% <100.00%> (ø)
tests/test_capture.py	99.40% <100.00%> (ø)
tests/test_parametrize.py	89.74% <100.00%> (ø)
tests/test_path.py	100.00% <100.00%> (ø)
tests/test_resolve_dependencies.py	98.27% <100.00%> (+0.25%)	⬆️

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