Testthat 3e

[VisruthSK]

Changed syntax to match testthat third edition syntax (swapped to non-deprecated functions and so on.) Also gitignored .vscode formula for code-oss editors workspace settings.

Closes #381.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.62%. Comparing base (94f2365) to head (1da4d23).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #397   +/-   ##
=======================================
  Coverage   98.62%   98.62%           
=======================================
  Files          35       35           
  Lines        5750     5750           
=======================================
  Hits         5671     5671           
  Misses         79       79           

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[VisruthSK]

Doesn't seem like there is any speedup, but worth swapping to 3e anyway for updates. If runs consistently take longer than sequential, should probably swap back.

[jgabry]

Great, thank you. I just triggered ubuntu-latest (devel) to run again since it failed for some reason.

If runs consistently take longer than sequential, should probably swap back.

Yeah might as well switch back if there's no benefit.

[jgabry]

Hmm, still erroring only on ubuntu-latest (devel). Unclear why (not much to go on in the logs from what I can tell). Could maybe be a temporary GHA issue (those seem to happen from time to time). But I guess could also be something we need to fix.

[jgabry]

I'm going to try disabling the parallel testing and see if that fixes it

[VisruthSK]

Neat that seemed to have fixed it. Some system bug?

[jgabry]

I guess, I'm not sure, it was pretty hard to tell anything useful from the logs. But glad it's fixed. The rest of this PR looks good. I'll go ahead and merge.