Minimal support for raw abi inputs

[slundqui]

#153

Minor fixes

• Bug fix for missing whitespace when there is no raw bytecode.
• Adding support for uint224.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 73.88%. Comparing base (cc87e61) to head (5ada73a).

Files with missing lines	Patch %	Lines
pypechain/utilities/abi.py	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #154      +/-   ##
==========================================
- Coverage   73.99%   73.88%   -0.12%     
==========================================
  Files          80       80              
  Lines        3834     3840       +6     
==========================================
  Hits         2837     2837              
- Misses        997     1003       +6     

Flag	Coverage Δ
unittests	73.88% <0.00%> (-0.12%)	⬇️

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