----------------
- Fix parsing of ``builders`` and ``display_renderers`` in custom parts.
[rnix]
- Fix signature of ``yafowil.yaml.tests.test_vocab``. Property callbacks always
gets passed ``widget`` and ``data`` as of yafowil 3.0.0.
[rnix]
- Parse values of attributes (data-Attributes) if type() is dict.
HTML5 Data-Attributes with i18n or callables are possible now.
[2silver]
**Breaking changes:**
- Add ``python:`` expressions. Needed for cases where property callbacks not
accept ``widget`` and ``data`` keyword arguments, e.g. ``datatype``. This is
necessary because ``callable_value`` function in yafowil 3.0 no longer calls
callable without arguments as fallback.
[rnix]