Update coverage toolchain

[mborland]

Should be able to run the to_chars runs which are hurting our coverage significantly

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.8%. Comparing base (b99bff6) to head (7af8f26).
⚠️ Report is 17 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #1068     +/-   ##
=========================================
+ Coverage     98.4%   98.8%   +0.5%     
=========================================
  Files          253     253             
  Lines        16608   17055    +447     
  Branches      1851    1868     +17     
=========================================
+ Hits         16326   16848    +522     
+ Misses         282     207     -75     

see 90 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b99bff6...7af8f26. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.