v3.1 with various small fixes and improvements

[RobH123]

This change is 

[codecov]

Codecov Report

Merging #229 (48efeeb) into master (2cb0ce8) will increase coverage by 0.39%.
The diff coverage is 34.00%.

@@            Coverage Diff             @@
##           master     #229      +/-   ##
==========================================
+ Coverage   40.00%   40.40%   +0.39%     
==========================================
  Files          30       31       +1     
  Lines        4504     4616     +112     
  Branches     1728     1765      +37     
==========================================
+ Hits         1802     1865      +63     
- Misses       1643     1644       +1     
- Partials     1059     1107      +48     

Impacted Files	Coverage Δ
src/core/orig-quote-check.js	10.74% <0.00%> (-0.33%)	⬇️
src/core/questions-tsv7-row-check.js	49.19% <0.00%> (ø)
src/core/twl-tsv6-row-check.js	52.87% <0.00%> (ø)
src/core/usfm-text-check.js	44.21% <16.80%> (-0.35%)	⬇️
src/core/getApi.js	15.92% <19.35%> (+0.01%)	⬆️
src/core/questions-tsv7-table-check.js	55.30% <20.00%> (ø)
src/core/notes-tsv7-table-check.js	55.03% <25.00%> (ø)
src/core/tn-tsv9-table-check.js	60.16% <25.00%> (ø)
src/core/twl-tsv6-table-check.js	57.36% <25.00%> (ø)
src/core/markdown-text-check.js	57.85% <42.85%> (-1.10%)	⬇️
... and 13 more

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[RobH123]

Updated to v3.1 because of the number of updates.

[mandolyte]

Reviewed 7 of 30 files at r1, 35 of 35 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @RobH123)