Bump dependencies and Python minimum

[jborean93]

Bump the Python minimum to Python 3.8 as Python 3.7 is nearing end of life and 3.8 as a baseline removes a few compatibility hacks. Also bumps some of the dev dependencies to the latest versions available.

[codecov]

Codecov Report

Merging #175 (1a053ee) into master (bfea572) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 1a053ee differs from pull request most recent head 97bdb5a. Consider uploading reports for the commit 97bdb5a to get more accurate results

@@            Coverage Diff             @@
##           master     #175      +/-   ##
==========================================
- Coverage   99.85%   99.85%   -0.01%     
==========================================
  Files          17       16       -1     
  Lines        3511     3496      -15     
==========================================
- Hits         3506     3491      -15     
  Misses          5        5              

Flag	Coverage Δ
	99.85% <100.00%> (-0.01%)	⬇️
py3.10	99.85% <100.00%> (-0.01%)	⬇️
py3.11	99.85% <100.00%> (+27.05%)	⬆️
py3.7	?
py3.8	99.85% <100.00%> (-0.01%)	⬇️
py3.9	99.85% <100.00%> (-0.01%)	⬇️
x64	99.85% <100.00%> (-0.01%)	⬇️
x86	99.42% <100.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
src/psrp/_connection/process.py	100.00% <ø> (ø)
src/psrp/_connection/wsman.py	99.56% <ø> (-0.01%)	⬇️
src/psrp/_sync.py	100.00% <ø> (ø)
src/psrp/_async.py	100.00% <100.00%> (ø)
src/psrp/_connection/named_pipe.py	98.75% <100.00%> (ø)
src/psrp/_io/wsman.py	99.61% <100.00%> (-0.01%)	⬇️