jsonproc improperly handles certain characters

[GriffinR]

cleanString has special handling for é:

pokeemerald/tools/jsonproc/jsonproc.cpp

Line 108 in 1163643

 string badChars = ".'{} \n\t-\u00e9"; 

but will fail to process some other reasonable characters. See huderlem/porymap#557 for an example.

[ExcmoJack]

I would like to add that, if it's possible, the right substitution should be the character without the variation, for instance: á for a.