refactor: remove unnecessary Collection methods and add Collection#partition (#2511)
refactor: remove unnecessary Collection methods and add Collection#partition (#2511)

* Rework collection

* Fix docs

* Remove (prop, value) behavior

* Add back thisArg

* Put examples on same line

* Revert map to return array

* Make examples less specific

* Add thisArg to sweep and partition

appellation/discord.js,appellation/discord.js,hydrabolt/discord.js,Lewdcario/discord.js,hydrabolt/discord.js,SpaceEEC/discord.js,Lewdcario/discord.js,appellation/discord.js,SpaceEEC/discord.js,Lewdcario/discord.js,hydrabolt/discord.js,SpaceEEC/discord.js