Updated for GitPython#33

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openstreetmap:master

Commits on Feb 26, 2017

Add support for GitPython 1.x
tomhughes
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Commits on Jul 20, 2018

Add support for GitPython 2.x
tomhughes
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Commits on May 19, 2020

Convert to python 3
tomhughes
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Commits on Jul 11, 2022

Update for python 3.10 compatibility
tomhughes
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