Fix coverage.

[davidlehn]

• Use codecov/codecov-action@v3.

[codecov]

Codecov Report

Merging #113 (0fa0da9) into main (fa55908) will increase coverage by 0.23%.
Report is 16 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #113      +/-   ##
==========================================
+ Coverage   80.00%   80.23%   +0.23%     
==========================================
  Files          10       10              
  Lines        1800     1821      +21     
==========================================
+ Hits         1440     1461      +21     
  Misses        360      360              

Files	Coverage Δ
lib/config.js	100.00% <100.00%> (ø)
lib/configUtil.js	100.00% <100.00%> (ø)
lib/events.js	78.57% <100.00%> (+1.64%)	⬆️
lib/helpers.js	71.42% <100.00%> (+1.05%)	⬆️
lib/index.js	68.81% <100.00%> (+0.08%)	⬆️
lib/loggers/WorkerTransport.js	89.58% <100.00%> (+0.45%)	⬆️
lib/loggers/fileLogger.js	80.39% <100.00%> (+0.39%)	⬆️
lib/loggers/formatters.js	66.01% <100.00%> (+0.67%)	⬆️
lib/loggers/index.js	89.42% <100.00%> (+0.10%)	⬆️
lib/util.js	94.17% <100.00%> (+0.11%)	⬆️

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[davidlehn]

Using v3 of the action is needed for it to work without a special token. Once a plan on how to support v4 at scale is determined, this can switch back.