Fix give voucher issues in 1.12.2
Fix use voucher issues in CatServer 1.12.2
Improve read/write the databases performance
Rewrite some code about read/write the databases
Fix cannot save inventory to databases when over 1000's vault

New feature: Global control of player place/pickup of vault items (allowed by default)

Vault:
Event:
Place: true
Pickup: true

To prohibit players from placing items into the vault
Set Place: false
To prohibit players from taking items from the vault
Set Pickup: false

Individual players can ignore it through permissions
Playerinv.vault.event.place.ignore --ignores restrictions on placing items (when false)
Playerinv.vault.event.pickup.ignore --ignores restrictions on taking items (when false)