Add support for PropTypes.arrayOf and/or PropTypes.shape

[sapegin]

This does not render correctly:

items: PropTypes.arrayOf(PropTypes.shape({
            value: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
            label: PropTypes.any.isRequired
        })).isRequired

Expected result:

items   arrayOf ???

Actual result:

items   arrayOf