Use Illuminate\Database\Eloquent\Casts\Json if possible

[naxvog]

Tries to use Illuminate\Database\Eloquent\Casts\Json if it is available and falls back to native json_encode/json_decode otherwise.

This change allows the usage of custom JSON serializers or custom serialization options by defining the following in a service provider:

Json::encodeUsing(fn ($value) => json_encode($value, JSON_UNESCAPED_UNICODE));

[rubenvanassche]

Thanks!

[rubenvanassche]

Breaks a lot of cases, reverting