fix(READY): do not overwrite Client#user when reidentifying
fix(READY): do not overwrite Client#user when reidentifying

See #3216, this commit attempts to fix losing ClientUser#_typing, which results in no longer being able to clear typing intervals

SpaceEEC/discord.js,appellation/discord.js,SpaceEEC/discord.js,appellation/discord.js,SpaceEEC/discord.js,appellation/discord.js