Product updates

Still waiting for Pycord to finish its v2.0 update before I move on to DaBaby v2.0. In the meantime, I made a few changes, most being backend and security changes (i.e. you don't see them!)

Misc. Changes

• Removed $run.
• Error messages are now deleted after 20 seconds (15 to 20).

I hope to address some of the feature creep that's happened over time while working on v2.0. Keep looking forward to that!

v1.3.1 Event Fix

• Bot now properly filters upper and lowercase letters during the Stolen Letter event.
• Changed webhooks to display user's nickname if available (originally username).