UnicodeDecodeError when running pre-commit on Windows with `v2.3.0`

[sgbaird]

autoflake................................................................Failed
- hook id: autoflake
- exit code: 1

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\sterg\.cache\pre-commit\repop8j70l5p\py_env-default\Scripts\autoflake.EXE\__main__.py", line 7, in <module>
  File "C:\Users\sterg\.cache\pre-commit\repop8j70l5p\py_env-default\Lib\site-packages\autoflake.py", line 1599, in main
    return _main(
           ^^^^^^
  File "C:\Users\sterg\.cache\pre-commit\repop8j70l5p\py_env-default\Lib\site-packages\autoflake.py", line 1513, in _main
    args, success = merge_configuration_file(args)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sterg\.cache\pre-commit\repop8j70l5p\py_env-default\Lib\site-packages\autoflake.py", line 1275, in merge_configuration_file
    config = find_and_process_config(flag_args)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sterg\.cache\pre-commit\repop8j70l5p\py_env-default\Lib\site-packages\autoflake.py", line 1234, in find_and_process_config
    config = processor(config_file_path)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sterg\.cache\pre-commit\repop8j70l5p\py_env-default\Lib\site-packages\autoflake.py", line 1211, in process_config_file
    reader.read(config_file_path)
  File "C:\Users\sterg\miniforge3\envs\honegumi\Lib\configparser.py", line 713, in read
    self._read(fp, filename)
  File "C:\Users\sterg\miniforge3\envs\honegumi\Lib\configparser.py", line 1036, in _read
    for lineno, line in enumerate(fp, start=1):
  File "C:\Users\sterg\miniforge3\envs\honegumi\Lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 295: character maps to <undefined>

For now I'm just disabling the hook instead of trying to debug further (already tried with new environments).

[fsouza]

Ugh I think that's because we're trying to decode setup.cfg with cp1252 and you likely have non-ascii characters in the setup.cfg file. Perhaps we should just set encoding to "utf-8".