fixes conversion from VehicleStep service times

[codecov[bot]]

Codecov Report

Merging #83 (9880718) into main (1bf35f4) will decrease coverage by 0.2%. The diff coverage is 50.0%.

@@           Coverage Diff           @@
##            main     #83     +/-   ##
=======================================
- Coverage   78.3%   78.2%   -0.2%     
=======================================
  Files         29      29             
  Lines       1516    1522      +6     
  Branches      17      17             
=======================================
+ Hits        1188    1191      +3     
- Misses       319     322      +3     
  Partials       9       9             

Flag	Coverage Δ
binding	68.1% <ø> (ø)
python	91.1% <50.0%> (-0.4%)	:arrow_down:

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[jonathf]

Good catch. Thanks.