`latex_to_unicode` attacks math mode commands

[tcosmo]

Describe the bug

I have "$\omega$" in the title of a bibtex entry.

latex_to_unicode transforms \o into ø, resulting in:

Reproducing

Version: 1.4.3

Code:

parser = BibTexParser()
parser.customization = convert_to_unicode
bib_database = bibtexparser.loads(bib_content, parser=parser)

Bibtex:

@article{Scollo2005,
  author  = {Giuseppe Scollo},
  title   = {{$\omega$-rewriting the Collatz problem}},
  journal = {Fundamenta Informaticae},
  year    = {2005},
  volume  = {64},
  pages   = {401--412},
  note    = {MR 2008g:68060, Zbl 1102.68051}
}

Workaround Did you identify a workaround? If so, please describe it here.

Remaining Questions (Optional) Please tick all that apply:

• [x] I would be willing to contribute a PR to fix this issue.
• [ ] This issue is a blocker, I'd be grateful for an early fix.