Update pip to latest version for test requirements

[gsheni]

No description provided.

[codecov]

Codecov Report

Merging #265 (caaebad) into main (88f9402) will decrease coverage by 0.07%.
The diff coverage is 99.62%.

@@             Coverage Diff             @@
##              main     #265      +/-   ##
===========================================
- Coverage   100.00%   99.92%   -0.08%     
===========================================
  Files           28       28              
  Lines         1304     1324      +20     
===========================================
+ Hits          1304     1323      +19     
- Misses           0        1       +1     

Impacted Files	Coverage Δ
composeml/data_slice/extension.py	99.32% <95.23%> (-0.68%)	⬇️
composeml/conftest.py	100.00% <100.00%> (ø)
composeml/data_slice/generator.py	100.00% <100.00%> (ø)
composeml/data_slice/offset.py	100.00% <100.00%> (ø)
composeml/demos/__init__.py	100.00% <100.00%> (ø)
composeml/label_maker.py	100.00% <100.00%> (ø)
composeml/label_search.py	100.00% <100.00%> (ø)
composeml/label_times/description.py	100.00% <100.00%> (ø)
composeml/label_times/deserialize.py	100.00% <100.00%> (ø)
composeml/label_times/object.py	100.00% <100.00%> (ø)
... and 14 more