A summary of issues which happened:
- Git decided to add an amend commit (I told it to quit?)
- VS Code thinks everything is an error so it wasn't helpful
- dotnet decided to think there was no error until I deleted all
  build outputs and rebuild

Sometimes I question my ability to use version control properly.

Apparently git didn't like that previous commit

People in #dotnet_discord-net suggested that this should be part of
the lib after I demonstrated it

never overestimate the end user

Add BeforeExecute/AfterExecute methods to ModuleBase

Ensure aliases are built in the correct order

Fixed Format.Sanitize

Replace ConcurrentBag<T> with HashSet<T>

Fixed users not being updated on PRESENCE_UPDATEs

Fixed guild member's joinedat reseting after certain events

Fixed RemoveReactionAsync overload doesn't work with unicode emojis

removed comma and space

Fixes #487