* Handle edge cases when object might be `None` in `data` and `field_to_native` attributes of `PropertySerializer` (those cases occur when browsable APIs are used).
0.1.0
* Rename `PropertiesSerializer` to `PropertySerializer` and `NestedPropertiesSerializer` to `NestedPropertySerializer` - because we usually use resource names in singular form.
0.0.1
* Initial version. Fix `_options_class` for `NestedPropertiesSerializer`