Now you can enable a checkpoint system for parkour event.
- If the option is enabled, all pressure plates will be considered a checkpoint.
- The new values are:

use-checkpoints: true
update-checkpoint-message: "&aNew checkpoint saved!"
teleport-checkpoint-message: "&eTeleported to your previous checkpoint."
checkpoint-item-name: "&bCheckpoint"

Fixed a bug where leave-commands were being executed twice if finish type was timelimit.