------------------------
- Move to `pytest`__ and `sybil`__ for testing.
- Drop support for Python 3.3.
- Add :func:`~mush.declarations.update_wrapper` helper.
- Add support for using Python 3 :ref:`type annotations <type-annotations>`
to specify requirements and returned resources.
- Add support for :ref:`arg names <default-configuration>` being used as
requirements when there is no other configuration.
- Add an explicit way of :attr:`ignoring <mush.declarations.nothing>` the return value of a
callable.
__ https://docs.pytest.org/en/latest/
__ http://sybil.readthedocs.io/en/latest/