More events to cancel for players without vane.admin.modify_world

[hjk321]

The following events should be cancelled for players who have not been vouched for:

• EntityTargetLivingEntityEvent (player can't take damage so the mob shouldn't try to target them)
• EntityInsideBlockEvent (triggering pressure plates etc might have side effects on the world)
• EntityPickupItemEvent
• PlayerAttemptPickupItemEvent
• PlayerPickupArrowEvent
• PlayerPickupExperienceEvent
• PlayerDropItemEvent