bad character range in a file skip glob

[peternewman]

Also, as result codespell --skip "example file with actual [weird signs in it and b-a]" goes down with

Traceback (most recent call last):
  File "/home/mateusz/.local/bin/codespell", line 8, in <module>
    sys.exit(_script_main())
  File "/home/mateusz/.local/lib/python3.8/site-packages/codespell_lib/_codespell.py", line 748, in _script_main
    return main(*sys.argv[1:])
  File "/home/mateusz/.local/lib/python3.8/site-packages/codespell_lib/_codespell.py", line 876, in main
    if glob_match.match(root):  # skip (absolute) directories
  File "/home/mateusz/.local/lib/python3.8/site-packages/codespell_lib/_codespell.py", line 108, in match
    if fnmatch.fnmatch(filename, p):
  File "/usr/lib/python3.8/fnmatch.py", line 36, in fnmatch
    return fnmatchcase(name, pat)
  File "/usr/lib/python3.8/fnmatch.py", line 70, in fnmatchcase
    match = _compile_pattern(pat)
  File "/usr/lib/python3.8/fnmatch.py", line 46, in _compile_pattern
    return re.compile(res).match
  File "/usr/lib/python3.8/re.py", line 252, in compile
    return _compile(pattern, flags)
  File "/usr/lib/python3.8/re.py", line 304, in _compile
    p = sre_compile.compile(pattern, flags)
  File "/usr/lib/python3.8/sre_compile.py", line 764, in compile
    p = sre_parse.parse(p, flags)
  File "/usr/lib/python3.8/sre_parse.py", line 948, in parse
    p = _parse_sub(source, state, flags & SRE_FLAG_VERBOSE, 0)
  File "/usr/lib/python3.8/sre_parse.py", line 443, in _parse_sub
    itemsappend(_parse(source, state, verbose, nested + 1,
  File "/usr/lib/python3.8/sre_parse.py", line 834, in _parse
    p = _parse_sub(source, state, sub_verbose, nested + 1)
  File "/usr/lib/python3.8/sre_parse.py", line 443, in _parse_sub
    itemsappend(_parse(source, state, verbose, nested + 1,
  File "/usr/lib/python3.8/sre_parse.py", line 598, in _parse
    raise source.error(msg, len(this) + 1 + len(that))
re.error: bad character range b-a at position 56

_Originally posted by @matkoniecz in #2142 (comment)

While that glob obviously won't work, we probably shouldn't crash quite so unhelpfully and instead catch the error...