chore: lint json

[arr00]

This PR adds JSON linting to tests to ensure that the URI returned by the contracts is valid.

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[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (bc9ff66) 59.86% compared to head (77baf1f) 59.86%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #287   +/-   ##
=======================================
  Coverage   59.86%   59.86%           
=======================================
  Files          61       61           
  Lines        2429     2429           
  Branches      568      568           
=======================================
  Hits         1454     1454           
  Misses        778      778           
  Partials      197      197           

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