[MAINT] lint & format repo; update CI; handle DeprWarns, etc.

[jGaboardi]

This PR:

• lints and formats the mapclassify repo
  • several variables renamed due to flake8 complaining
  • several variables/code chunks removed/commented out due to being flagged by flake8 as not used
• add a pre-commit hook for formatting & listing
• drop support/testing for Python 3.7
• add linting to CI
• cleans up testing for warnings
• rerun notebooks
• cleans up and add doctests to CI run, and adapts for windows
• add random seed keyword args to classifiers.MaxP

Still needs attention: (probably handle in a separate PR)

mapclassify/tests/test_mapclassify.py::TestUserDefined::test_UserDefined_invariant
  /Users/user/mapclassify/mapclassify/classifiers.py:908: RuntimeWarning: invalid value encountered in double_scalars
    gadf = 1 - self.adcm / Adam

xref: geopandas/geopandas#2553

[codecov]

Codecov Report

Merging #128 (ff5c0a6) into master (1887b32) will increase coverage by 4.2%.
The diff coverage is 87.5%.

@@           Coverage Diff            @@
##           master    #128     +/-   ##
========================================
+ Coverage    78.0%   82.2%   +4.2%     
========================================
  Files          12       7      -5     
  Lines        1936    1118    -818     
========================================
- Hits         1511     919    -592     
+ Misses        425     199    -226     

Impacted Files	Coverage Δ
mapclassify/classifiers.py	80.9% <81.0%> (+1.6%)	⬆️
mapclassify/_classify_API.py	93.1% <93.8%> (ø)
mapclassify/datasets/calemp/data.py	100.0% <100.0%> (ø)
mapclassify/greedy.py	91.4% <100.0%> (ø)
mapclassify/pooling.py	78.9% <100.0%> (-0.5%)	⬇️
mapclassify/__init__.py
mapclassify/_version.py
mapclassify/tests/test_classify.py
mapclassify/tests/test_greedy.py
mapclassify/tests/test_mapclassify.py
... and 1 more

[martinfleis]

looks mostly okay to me, thanks!

[jGaboardi]

looks mostly okay to me, thanks!

Need to make sure these tests are all passing. Really weird that tests only failed for macOS Py3.10 (which is what I'm running locally, of course passing). Hopefully the additional random seed keywords solve the failures.

[jGaboardi]

mostly okay

"mostly okay" is not a ringing endorsement. LOL. Anything specific to change/not change?

[martinfleis]

"mostly okay" referred to that one comment I left in the code :).