Update PlayerStates.cs

New Updates:
-Enable restriction to some items (Sun/Moon Gemstones)
-Enable the ability to "unlock" items when player finds them (corresponds with the ItemUnlock/ItemUnlockMoon scripts)
-Enable us to force an equipment onto the player (Ex: When player "picks up" an item, now they are holding it right away)
-Commented out ability to damage yourself (used for testing purposes)
-Set a function to refill canteen, but no script yet is created to enable that functionality. 
-Counter is now kept to limit uses of Canteen (set to 4)