Fix for cyclic schemas

[trieloff]

I thought I'd already merged this one. It is the fix for #185

[codecov]

Codecov Report

Merging #186 into master will decrease coverage by 0.25%.
The diff coverage is 94.11%.

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
- Coverage     100%   99.75%   -0.25%     
==========================================
  Files           8        8              
  Lines         396      400       +4     
==========================================
+ Hits          396      399       +3     
- Misses          0        1       +1

Impacted Files	Coverage Δ
lib/markdownBuilder.js	100% <100%> (ø)	⬆️
lib/traverseSchema.js	100% <100%> (ø)	⬆️
lib/formattingTools.js	94.11% <80%> (-5.89%)	⬇️

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[trieloff]

🎉 This PR is included in version 4.0.1 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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