Duplicate query argument fix

[michaeldgraham]

This is a followup PR to the recent augmentation rewrite, fixing a recently discovered bug that caused the generation of duplicate query arguments for filter and orderBy.

[codecov-io]

Codecov Report

Merging #332 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #332      +/-   ##
==========================================
+ Coverage   96.26%   96.27%   +0.01%     
==========================================
  Files          23       23              
  Lines        2568     2576       +8     
==========================================
+ Hits         2472     2480       +8     
  Misses         96       96

Impacted Files	Coverage Δ
src/augment/input-values.js	100% <100%> (ø)	⬆️

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