fix new clippy warnings

[gdesmott]

No description provided.

[codecov]

Codecov Report

Merging #57 (7af3253) into master (424ec89) will increase coverage by 0.19%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   77.29%   77.48%   +0.19%     
==========================================
  Files           3        3              
  Lines        2620     2620              
==========================================
+ Hits         2025     2030       +5     
+ Misses        595      590       -5     

Impacted Files	Coverage Δ
src/lib.rs	60.17% <100.00%> (+0.37%)	⬆️

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