[12.x] Add ArrayObject props to AsEncryptedArrayObject to match AsArrayObject

[AndrewMast]

Why

The AsArrayObject cast allows for accessing the array keys as props, but AsEncryptedArrayObject does not. I unexpectedly ran into this issue when changing the cast from AsArrayObject to AsEncryptedArrayObject.

What

I added ArrayObject::ARRAY_AS_PROPS when creating the ArrayObject in the AsEncryptedArrayObject cast.

- return new ArrayObject(Json::decode(Crypt::decryptString($attributes[$key])));
+ return new ArrayObject(Json::decode(Crypt::decryptString($attributes[$key])), ArrayObject::ARRAY_AS_PROPS);

[taylorotwell]

Is this a breaking change?

[AndrewMast]

Not to my knowledge, we can still do $arrayObject['key'] when using ArrayObject::ARRAY_AS_PROPS.