This brings back Python 3.7 support (allowing it to be installed on
3.7, and testing on 3.7 on CI), even though 3.7 is end-of-life,
because support for 3.7 is not being dropped by GitPython yet, and
there is value in keeping the version ranges supported by GitPython
and gitdb consistent.

This reverts commit 875acb4.

EliahKagan added a commit to EliahKagan/smmap that referenced this pull request

Analogous to gitpython-developers/gitdb#94,
this brings back Python 3.7 support (allowing it to be installed on
3.7, and testing on 3.7), even though 3.7 is end of life, because
support for 3.7 is not being dropped by GitPython (or gitdb) yet,
and there is value in keeping GitPython, gitdb, and smmap
consistent.

This reverts commit f1b4d14.

This was referenced