i.e. using 20220512_IMPARTNER_PPL51.csv which is distributed by Deutsche Post
via email.
NB: the update doesn't contain any price updates but 'just' removes all
'Warenpost International' products.
Apparently, those products are/were migrated to DHL.
i.e. VAT temporarily changes from 19% to 16% as part of the Corona
related economy stimulus package. Deutsche Post thus adjusts the prices
for a subset of their products.
Without this patch, python 2.x would abort with a famous
'ascii' codec can't decode byte ...
error. This is why I kept the file free of special characters
so far, but commit 6d2ee85a7e
unfortunately broke that assumption.
I'm sure there's a proper solution, but I really don't feel like
investing time into researching and testing that now.