feat(User#locale)

[kevinbioj]

Please describe the changes this PR makes and why it should be merged:

Cover the totally new Discord API feature: the user's locale. The locale set on the user's client (desktop/mobile) will be sent through the User object to bots.
More information: discord/discord-api-docs#535

Semantic versioning classification:

• This PR changes the library's interface (methods or parameters added)
  • This PR includes breaking changes (methods removed or renamed, parameters moved or removed)
• This PR only includes non-code changes, like changes to documentation, README, etc.

[SpaceEEC]

This seems to be more of an oauth feature than a bot feature.

It is restricted to GET /users/@me, which limits it for bots to only themselves when one explicitly fetches them with client.users.fetch('@me'). (Not received via gateway)

Also bots seem to always have en-US as language.

[xDimGG]

Basically what space said.

This feature is adding support for a property which is meant to be used with OAuth2 and since bots always have en-US (according to space) and this lib isn't looking to support user accounts (#2559) it wouldn't make much sense to have this property.

But, feel free to change my mind.

[kevinbioj]

Eh you're right. There was a miscommunication on the original issue obviously. I thought bot accounts could get the locale, anyway.

To close 🔒

[devsnek]

can we re-open this? rpc uses it downstream

[kevinbioj]

👌