Prevent ErrorException when value is not iterable

[rogervila]

Hello,

When $value is a string, an ErrorException is thrown with the following message:

foreach() argument must be of type array|object, string given

This PR prevents that exception by checking if $value is an array, as expected.

[rogervila]

Hi @scaytrase

I am thinking about using is_iterable instead of is_array. WDYT?

[scaytrase]

Sounds great

[rogervila]

@scaytrase done :)

Thank you for the review!

[scaytrase]

Thanks @rogervila !