Implement events for MESSAGE_REACTION_ADD and MESSAGE_REACTION_REMOVE
Bug fixes:
Fixed crash when trying to format a date if your computer's language isn't set to English
No longer tries to convert a voice session_id to a Snowflake ID (since voice session_ids aren't Snowflake IDs)
Fixed rate limiting on requests that return an HTTP 204
Other changes:
Explicitly ignore events in the EventHandler switch statement instead of using a default case (so the compiler will complain if we forget to handle one)
Cache date formatters so we don't have to make new ones every time we format a date
Shards no longer own their parent Sword class
Switched from a for-in loop to a map when converting arrays to Emojis
Major changes:
Bug fixes:
Other changes: