Conversion from `duffus` to `tlo` does not handle diacritics correctly

[kbseah]

parsetc version parsetc 0.4.1 lark 1.1.9 unicodedata unidata_version 13.0.0

How did you install parsetc?

• [ ] Using pip install from PyPI
• [x] Using pip install . from cloned repository, if so, which branch and commit? master 75b10b41
• [ ] Other: please describe

Describe the error cat examples/teochew.duffus.txt | parsetc -l Teochew -i duffus --all

• [ ] parsetc command crashed with an error:
• [x] Output romanization is wrong

tlo lâi-sî pêh-be2 kua3 kim-uann1
duffus  lâi-sî pėh-be2 kua3 kim-uaⁿ1

Input text

lai5-si5 peh8-be2 kua3 kim1-uaⁿ1

Expected output

lâi-sî pêh-bé kùa kim-uann

Additional information