-------------------
- Move from `nose`__ to `pytest`__ for running tests.
__ http://nose.readthedocs.io/en/latest/
__ https://docs.pytest.org/en/latest/
- Switch from `manuel`__ to `sybil`__ for checking examples in
documentation. This introduces a backwards incompatible change
in that :class:`~testfixtures.sybil.FileParser` replaces the Manuel
plugin that is no longer included.
__ http://packages.python.org/manuel/
__ http://sybil.readthedocs.io/en/latest/
- Add a 'tick' method to :meth:`test_datetime <testfixtures.datetime.MockDateTime.tick>`,
:meth:`test_date <testfixtures.datetime.MockDate.tick>` and
:meth:`test_time <testfixtures.datetime.MockTime.tick>`,
to advance the returned point in time, which is particularly helpful
when ``delta`` is set to zero.