Full inventory = items lost

[Niko302]

Describe the bug
If you open a crate and you have a full inventory you will not receive the items given in the crate and thus losing items for players and leading to an ungodly amount of tickets.

To Reproduce
Open crate with full inventory

Expected behavior
Not allow opening of crate if inventory is full or close to full

Server Information (please complete the following information):
EcoCrates 1.12.3

** Solution **
Make it so in /plugins/EcoCrates/crates.yml you can define the following.

• id: skin
  name: "Skin Crate"
  inventory-full-alert: true #Cancels the opening of the crate and tell you that you have a full inventory
  inventory-full-slot-amount: 2 #how many free spaces should the player have to be able to open the crate