Set minimum version to py38

[mshriver]

Update pre-commit hooks, adjust github workflow matrix

RedHatQE/widgetastic.patternfly4#129

RedHatQE/widgetastic.patternfly#133

[codecov]

Codecov Report

Merging #214 (8c51982) into master (7b22887) will decrease coverage by 0.16%.
The diff coverage is 100.00%.

❗ Current head 8c51982 differs from pull request most recent head ac92272. Consider uploading reports for the commit ac92272 to get more accurate results

@@            Coverage Diff             @@
##           master     #214      +/-   ##
==========================================
- Coverage   86.58%   86.42%   -0.17%     
==========================================
  Files          18       18              
  Lines        2557     2556       -1     
==========================================
- Hits         2214     2209       -5     
- Misses        343      347       +4     

Flag	Coverage Δ
unittests	86.42% <100.00%> (-0.17%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/widgetastic/utils.py	84.61% <100.00%> (ø)
src/widgetastic/widget/table.py	88.85% <0.00%> (-0.46%)	⬇️
src/widgetastic/browser.py	75.84% <0.00%> (-0.19%)	⬇️

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[quarckster]

LGTM

[digitronik]

LGTM 👍