Can't set attribute error, when trying to use the same name as a Field

[rossmacarthur]

How to replicate:

from serde import Model, field

class A(Model):
    derp = field.Field()

class B(A):
    @property
    def derp(self):
        return 'something else'

B()  # does not work

Exception is

serde/model.py", line 284, in __init__
    setattr(self, name, value)
AttributeError: can't set attribute

[rossmacarthur]

I think class attributes / methods / properties with the same name as a field should take precedence, and those Fields will be dropped.

[rossmacarthur]

Resolved by #42