Not required rule doesnot work

[dzhaugasharov]

Bug Description: Is there not a required rule? Im tryin this rule:

params = {'otherParam': 'ABC'}
valid = Validator(params, {
        'mark': 'integer|min:1|max:3'
    })

The param mark is not required, so it can be None. But I get this errors: {'mark': {'Integer': "Expected Type of Int or Str, Got: <class 'NoneType'>", 'Min': "Could not get size from data. type = <class 'NoneType'>", 'Max': "Could not get size from data. type = <class 'NoneType'>"}}

[CSenshi]

Currently we don't support not required rule, but we are going to implement 'nullable' rule, so it can handle cases like this.

[dzhaugasharov]

Currently we don't support not required rule, but we are going to implement 'nullable' rule, so it can handle cases like this.

That would be awesome. Looking forward to it.

[CSenshi]

Thanks, for some time we stopped development of package, but we will be on the rails soon, if you would like to contribute I'd accept PR for this issue