Description:
------------
If we have some method that receives some arguments my reference, there is no way to invoke it with reflection.

Test script:
---------------
class TestReflectionMethodInvokeWithReferences
{
    private static function testTarget(array &$a): void
    {
        $a['new_key'] = 'new value';
    }
}

// Unit test use case
$testReflectionMethodInvokeWithReferences = new ReflectionClass(TestReflectionMethodInvokeWithReferences::class);
$target = $testReflectionMethodInvokeWithReferences->getMethod('testTarget');
$target->setAccessible(true);
$arg = [];
$target->invoke(null, &$arg);
var_exoprt($arg);

Expected result:
----------------
array (
  'new_key' => 'new value',
)


Actual result:
--------------
PHP Parse error:  syntax error, unexpected token "&", expecting ")" in php shell code on line 5