Fix Base unit and fork tests

[naddison36]

• Fixes post the merge of the Yield Delegation changes
• Added Base fork tests to the CI
• Added Solidity files to prettier:check used by the CI

[github-actions]

	Warnings
⚠️	👀 This PR needs at least 2 reviewers

Generated by 🚫 dangerJS against b9837f3

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 53.09%. Comparing base (a559741) to head (b9837f3).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
contracts/contracts/token/OUSD.sol	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2345      +/-   ##
==========================================
+ Coverage   52.59%   53.09%   +0.50%     
==========================================
  Files          80       82       +2     
  Lines        4101     4196      +95     
  Branches     1079     1101      +22     
==========================================
+ Hits         2157     2228      +71     
- Misses       1941     1965      +24     
  Partials        3        3              

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