sir-lancebot: Statuscat 418 doesn't work

Description

Http code 418 is reported to be invalid, even though its defined here. A cat exists for the status code too.

Steps to Reproduce

Send .statuscat 418 to Seasonalbot.

Expected Behaviour

Sends an embed with this image in it, and a header of Status: 418.

Actual Behaviour

Code not found:

Known Impacted Platforms

• Web
• Desktop
• Android App
• iOS App

Possible Solutions

Check for status code 418 before checking for the other codes the http library.

Would you like to implement a fix?

Note: For high-priority or critical bugs, fixes may be implemented by staff.

• I’d like to implement the bug fix
• Anyone can implement the bug fix