commitizen_emoji cannot write to CHANGELOG

Description

This is because commitizen_emoji uses unicode emoji characters, but commitizen does not specify the file encoding in write_changelog(), so it defaults back to cp1252:

https://github.com/commitizen-tools/commitizen/blob/79165119817cbd0aef25434a85dcbffa3a13acbb/commitizen/commands/changelog.py#L92

This could be fixed by specifying the utf-8 encoding:

with open(self.file_name, "w", encoding='utf-8') as changelog_file: 
   ...

Steps to reproduce

> cz bump --changelog
bump: version 0.4.0 → 0.5.0
tag to create: 0.5.0       
increment detected: MINOR  

Traceback (most recent call last):
  File "C:\Program Files\Python38\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Program Files\Python38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\hendra11\Code\external\cz-emoji\.venv\Scripts\cz.exe\__main__.py", line 7, in <module>
  File "C:\Users\hendra11\Code\external\cz-emoji\.venv\lib\site-packages\commitizen\cli.py", line 382, in main
    args.func(conf, vars(args))()
  File "C:\Users\hendra11\Code\external\cz-emoji\.venv\lib\site-packages\commitizen\commands\bump.py", line 215, in __call__
    changelog_cmd()
  File "C:\Users\hendra11\Code\external\cz-emoji\.venv\lib\site-packages\commitizen\commands\changelog.py", line 172, in __call__
    self.write_changelog(changelog_out, lines, changelog_meta)
  File "C:\Users\hendra11\Code\external\cz-emoji\.venv\lib\site-packages\commitizen\commands\changelog.py", line 103, in write_changelog
    changelog_file.write(changelog_out)
  File "C:\Program Files\Python38\lib\encodings\cp1252.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\U0001f389' in position 29: character maps to <undefined>

Current behavior

See Steps to reproduce

Desired behavior

Emojis can be logged to changelog

Screenshots

No response

Environment

• cz version: 2.27.0
• python version: 3.8.13
• platform.system(): ‘Windows’

[Lee-W]

It would be even more helpful if you could document this on the doc for windows users. Thanks!

[adam-grant-hendry]

‘utf-8’ should cover all encodings, but I’m fine with that. You’d have to change BaseCommitizen to grab that config variable and everywhere you have an open used in your codebase, change it to add the encoding.