Getter and setter addition for saturation. Enchanted golden apple works

[ZloyNick]

This commit adds 2 get|set methods:
Player::getSaturation();
Player::setSaturation($val);

and makes Enchanted Golden Apples are workable.

[yoraze]

#926 (comment)

[RandomClone]

You made a typo in line 2888

[ImDaRealAni]

#926 (comment)
Hydreon never merges public PRs anymore.

[ZloyNick]

You made a typo in line 2888

Fixed. Thanks.

[IceCruelStuff]

Maybe you should use public function getSaturation(): float and
public function setSaturation(float $sat)

[ZloyNick]

Maybe you should use public function getSaturation(): float and
public function setSaturation(float $sat)

SteadFast2 haven't types declaration.

[dktapps]

This PR is a waste of time as pointed out by myself in the comment linked above, which, you might notice, was given a 👍 by one of the Steadfast maintainers. So, it really makes no difference whether you apply those type hints or not.