I know `array` matches the docblock for the class property but since it in effect is an array of `Variable` it would be nice to have it declared as `Variable[]`.

Bonus points for also fixing [the docblock for the property itself](https://github.com/wsdl2phpgenerator/wsdl2phpgenerator/blob/master/src/Wsdl2PhpGenerator/ComplexType.php#L30) :smile: .