ARPABETMapper generates phones that are not part of ARPABET

[nkaenzig-aifund]

The ARPABETMapper class seems to map some IPA phones to phones that are not part of ARPABET. So far I've seen the following examples: {'EA', 'IA', 'OH', 'Q', 'UA'}

Code to reproduce:

from ipapy.arpabetmapper import ARPABETMapper
amapper = ARPABETMapper()
amapper.map_unicode_string('o' + 'ʔ', ignore=True, return_as_list=True)

# OUTPUT: ['OH', 'Q']