add support for array of Struct and array of NestedStruct

[dpaiton]

• add function for computing Struct type that considers arrays
• render snapshots to include updates from previous PR Update for underlying eth-account package update #109 & this PR
• typo fixes

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 37.65690% with 149 lines in your changes missing coverage. Please review.

Project coverage is 64.32%. Comparing base (46e0682) to head (0fc544d).

Files	Patch %	Lines
pypechain/test/errors/types/utilities.py	17.85%	23 Missing ⚠️
pypechain/test/events/types/utilities.py	17.85%	23 Missing ⚠️
pypechain/test/overloading/types/utilities.py	17.85%	23 Missing ⚠️
pypechain/test/structs/types/utilities.py	17.85%	23 Missing ⚠️
pypechain/test/deployment/types/utilities.py	21.42%	22 Missing ⚠️
pypechain/templates/utilities.py	36.84%	12 Missing ⚠️
pypechain/utilities/abi.py	25.00%	9 Missing ⚠️
pypechain/test/return_types/types/utilities.py	71.42%	8 Missing ⚠️
pypechain/utilities/types.py	0.00%	4 Missing ⚠️
pypechain/main.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #111      +/-   ##
==========================================
- Coverage   67.34%   64.32%   -3.03%     
==========================================
  Files          49       49              
  Lines        2346     2531     +185     
==========================================
+ Hits         1580     1628      +48     
- Misses        766      903     +137     

Flag	Coverage Δ
unittests	64.32% <37.65%> (-3.03%)	⬇️

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[sentilesdal]

lgtm if tests are passing