Add return types to call() methods.

[sentilesdal]

• update snapshots to include call fns
• add return types to call() methods

[codecov-commenter]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (4789f4f) 68.44% compared to head (3aedd2b) 67.52%.

Files	Patch %	Lines
pypechain/utilities/types.py	54.54%	10 Missing ⚠️
pypechain/render/contract.py	33.33%	4 Missing ⚠️
pypechain/utilities/format.py	0.00%	3 Missing ⚠️
pypechain/utilities/abi.py	96.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
- Coverage   68.44%   67.52%   -0.92%     
==========================================
  Files          17       17              
  Lines         507      545      +38     
==========================================
+ Hits          347      368      +21     
- Misses        160      177      +17     

Flag	Coverage Δ
unittests	67.52% <68.96%> (-0.92%)	⬇️

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