Missing INVITE_CREATE, INVITE_DELETE, MESSAGE_REACTION_REMOVE_EMOJI events and Delete All Reactions for Emoji endpoint

Created by: uwx

Summary

The newly-added events Invite Create, Invite Delete and Message Reaction Remove Emoji, in tandem with the new Delete All Reactions for Emoji endpoint, have to be added to the library.

Details

These events were added a few days ago ^{(ERR: TIME IS RELATIVE)} and are documented in an unmerged PR discordapp/discord-api-docs#1309.

Notes

These were reported by Talion Oak#0001 and @Quahu.