Update required CodeCov CI patch coverage for pass

[sbryngelson]

https://stackoverflow.com/questions/51635964/setting-codecov-patch-target-to-a-fixed-number

CodeCov fails project and/or patch if the PR does not hit a certain percent threshold. You can manually tune this to a specific number, else it is based upon previous coverage numbers. I want coverage to always pass (I see the numbers regardless). This PR enforces this codecov.yml

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.89%. Comparing base (daf3acd) to head (ee7216f).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #726   +/-   ##
=======================================
  Coverage   42.89%   42.89%           
=======================================
  Files          61       61           
  Lines       16297    16297           
  Branches     1881     1881           
=======================================
  Hits         6991     6991           
  Misses       8264     8264           
  Partials     1042     1042           

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