[10.x] Array to string conversion error exception

[hans-thomas]

Hi, I fixed #48187 issue. The issue was to find the related translation line for a boolean validation rule while its value is an array.

Before

$validator = \Illuminate\Support\Facades\Validator::make([
    'is_customer' => ['test'],
    'fullname' => null
], [
    'is_customer' => 'required|boolean',
    'fullname' => 'required_if:is_customer,true'
]);
  
$validator->fails(); // ErrorException

After

$validator = \Illuminate\Support\Facades\Validator::make([
    'is_customer' => ['test'],
    'fullname' => null
], [
    'is_customer' => 'required|boolean',
    'fullname' => 'required_if:is_customer,true'
]);
  
$validator->fails(); // Return true