fix(carriers): fix non-platform carriers being turned into postnl

[codecov[bot]]

Codecov Report

Merging #188 (46fc702) into main (7fc2d0b) will increase coverage by 0.03%. The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #188      +/-   ##
============================================
+ Coverage     93.04%   93.08%   +0.03%     
  Complexity     1506     1506              
============================================
  Files           290      290              
  Lines          5189     5189              
============================================
+ Hits           4828     4830       +2     
+ Misses          361      359       -2     

see 1 file with indirect coverage changes

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[MyParcelBot]

:tada: This PR is included in version 2.20.1 :tada:

The release is available on GitHub release

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