CI - update codecov action to v2

[briantist]

SUMMARY

Update codecov action to v2

See also:

• https://github.com/codecov/codecov-action#%EF%B8%8F--deprecration-of-v1
• feat: Use new Codecov uploader codecov/codecov-action#392
• https://docs.codecov.com/docs/about-the-codecov-bash-uploader
• https://docs.codecov.com/docs/codecov-uploader

ISSUE TYPE

COMPONENT NAME

ADDITIONAL INFORMATION

[briantist]

codecov/codecov-action#423

[codecov]

Codecov Report

Merging #108 (57472d9) into main (c4c36e6) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #108   +/-   ##
=======================================
  Coverage   83.52%   83.52%           
=======================================
  Files          16       16           
  Lines         892      892           
  Branches       87       87           
=======================================
  Hits          745      745           
  Misses        129      129           
  Partials       18       18           

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