Topology sorting functionality added with docs

[michielmulders]

[codecov-io]

Codecov Report

Merging #143 into master will decrease coverage by 3.79%. The diff coverage is 11.11%.

@@           Coverage Diff            @@
##           master    #143     +/-   ##
========================================
- Coverage    82.7%   78.9%   -3.8%     
========================================
  Files          11      12      +1     
  Lines         266     275      +9     
========================================
- Hits          220     217      -3     
- Misses         46      58     +12

Impacted Files	Coverage Δ
src/utils/topologySorting.js	11.11% <11.11%> (ø)
src/request.js	78.57% <0%> (-14.29%)	:arrow_down:
src/baseRequest.js	72.41% <0%> (-6.9%)	:arrow_down:

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[michielmulders]

Ok I see, I have to create a test for this.

[future-is-present]

Also, are you planning to add some tests for the topologySorting.js functions ?