anyof does not respect nullable: True

[socketpair]

validator = Validator({
    'last_version': {
        'type': 'dict',
        'required': True,
        'nullable': True,  # <----- !!!
        'anyof_schema': [
            {
                'qwe': {
                    'type': 'integer',
                    'required': True,
                    'nullable': False,
                },
            },
            {
                'asd': {
                    'type': 'integer',
                    'required': True,
                    'nullable': False,
                },
            },
        ],

    },
})
if not validator.validate({'last_version': None}):
    raise ValueError(f'Data validation error: {validator.errors}.')

This example shows:

Data validation error: {'last_version': ['no definitions validate', {'anyof definition 0': ['null value not allowed'], 'anyof definition 1': ['null value not allowed']}]}

I think, this schema MUST allow None value.

[dkbarn]

Duplicate of #582

[funkyfuture]

and it was solved with 35d9f7b.