Bjarne Koll 6b00b14539 #639: Deep clone itemmetas persistent container on clone
After this commit, spigot now creates a deep copy of the
itemmeta's persistent data container when the itemmeta
instance is cloned.

This change fixes the bug that, after cloning itemmeta, the container
instance the cloned meta would point to was equal to the original one.
This resulted in two itemmeta instances sharing a single persistent
container.
2020-03-02 13:10:21 +11:00
..