Port to PM4

[ErikPDev]

Please make sure your issue complies with these guidelines:

• • [X] Use same formatting
• • [X] Changes must have been tested on PMMP.
• • [X] Unless it is a minor code modification, you must use an IDE.
• • [X] Have a detailed title.

What does the PR change?

This pull request is a port to pm4.

Testing Environment

• PocketMine-MP: 4.2.0
• PHP: 8.0.13
• Server OS: win

Extra Information

I couldn't figure out how to Port onUpdate to api4.0. Maybe a repeating task could work?

[DaPigGuy]

Upgrading to InvMenu 4.3.8 should also be considered

[ErikPDev]

I made a mistake, I clicked resolve convo instead of commit 😂

[ErikPDev]

PHPStan seems to be using a PM3