Add a test case for invalid range

[humdrum]

What this PR does / why we need it:
Add a test case for an invalid range from remote selection

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Additional documentation:

Checklist:

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Merging #59 (cea91c6) into main (5f123d8) will decrease coverage by 0.35%.
The diff coverage is 7.29%.

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
- Coverage   59.77%   59.42%   -0.35%     
==========================================
  Files          91       91              
  Lines       13268    13356      +88     
==========================================
+ Hits         7931     7937       +6     
- Misses       5337     5419      +82     

Impacted Files	Coverage Δ
Sources/Document/Json/JSONText.swift	54.66% <0.00%> (-1.12%)	⬇️
Sources/Util/String+Extensions.swift	68.42% <0.00%> (-31.58%)	⬇️
Tests/Integration/ClientIntegrationTests.swift	0.83% <0.00%> (ø)
Tests/Integration/CounterIntegrationTests.swift	0.72% <0.00%> (ø)
Tests/Integration/TextIntegrationTests.swift	1.36% <1.31%> (-0.02%)	⬇️
Sources/Document/CRDT/RGATreeSplit.swift	79.76% <100.00%> (+0.20%)	⬆️

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