Added support for Arrayable

[felixbessler]

Problem

We have a custom cast that translates a string to an object, which works fine when we use it like this:

$dto->object

But when we need the values in an array, for example for each VueJS component, we lose that value. The ->toArray() function makes it an empty array because of PHPs array casting of an object.

Solution

With this PR we are trying to add support for the Arrayable interface from Laravel. It already works like this, I just can't figure out how to test this change as easily as possible. I would need a custom cast file that returns an object, a custom object file..

And before I add all of this, I wanted to ask for your opinion on this change, and also on the testing approach. Perhaps you have a better idea?

[WendellAdriel]

I like the idea. 🔥
Regarding the test approach, if we want to have a good test for that, I think that you're going to need to create those custom files to make sure that this is working as expected.

[felixbessler]

Cool, then I added a test that checks the support of Arrayable. If you want me to change anything, please let me know.

[WendellAdriel]

Thank you for the work on this! 💪