Error running on macOS

[LuiFerreiraD]

Hi,
I am trying to use the package, but unfortunately I am encountering an error when importing it.
When calling the "from .lexicon import Lex", there's an error in the LOCALE setting.
LOCALE = locale.getdefaultlocale()[0].replace("_", "-"), but my macOS returns (None, 'UTF8') to the "locale.getdefaultlocale()" call. The error is as follows:
"AttributeError: 'NoneType' object has no attribute 'replace'"
I see in the documentation of "Client" that it has the option to be None, so I think this was considered in the client.py but not on the lexicon.

The fix should be easy, it think: LOCALE = locale.getdefaultlocale()[0].replace("_", "-") if locale.getdefaultlocale()[0] else None

[frissyn]

@LuiFerreiraD I not 100% sure, but it might be an issue with not being able to access environment variables, or some other means of determining your system's locale. I'll add a check for this in the next day or so though, thanks for reporting!