fix security warning

[wangfenjin]

Change-Id: I4619e00d71a58d28de582a10eb5795cf1344306e

[codecov]

Codecov Report

Merging #73 (c30f031) into main (9cad33d) will decrease coverage by 3.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #73      +/-   ##
==========================================
- Coverage   77.04%   73.87%   -3.18%     
==========================================
  Files          26       26              
  Lines        2649     2802     +153     
==========================================
+ Hits         2041     2070      +29     
- Misses        608      732     +124     

Impacted Files	Coverage Δ
src/types/mod.rs	72.91% <ø> (ø)
src/lib.rs	74.66% <0.00%> (-15.93%)	⬇️
src/error.rs	19.82% <0.00%> (-4.65%)	⬇️
src/column.rs	73.80% <0.00%> (-3.70%)	⬇️
src/row.rs	65.13% <0.00%> (-1.02%)	⬇️

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