Fix list traversal

[arlyon]

Fixes #207

[codecov]

Codecov Report

Merging #208 (ab0748d) into master (d691b7c) will increase coverage by 0.31%.
The diff coverage is 100.00%.

❗ Current head ab0748d differs from pull request most recent head f032570. Consider uploading reports for the commit f032570 to get more accurate results

@@            Coverage Diff            @@
##           master    #208      +/-   ##
=========================================
+ Coverage    6.10%   6.41%   +0.31%     
=========================================
  Files         126     126              
  Lines       11162   11177      +15     
=========================================
+ Hits          681     717      +36     
+ Misses      10481   10460      -21     

Impacted Files	Coverage Δ
src/params.rs	58.77% <100.00%> (+18.36%)	⬆️
src/ids.rs	36.57% <0.00%> (+1.71%)	⬆️
src/client/base/async_std.rs	90.90% <0.00%> (+2.27%)	⬆️
src/resources/generated/customer.rs	22.75% <0.00%> (+2.39%)	⬆️

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