fixtures does not conform to PEP 396

[David Riddle]

For our package management we use automated tooling to extract version numbers from python packages. I would like to request that you change the __version__ attribute so that it conforms to PEP 396. Currently __version__ returns a tuple according to PEP 396 it should return a string.

PEP 396 states:

#. When a module (or package) includes a version number, the version
   SHOULD be available in the ``__version__`` attribute.

#. The ``__version__`` attribute's value SHOULD be a string.

[David Riddle (ddriddle)]

I created a pull request on GitHub to fix this: https://github.com/testing-cabal/fixtures/pull/9

[Robert Collins (lifeless)]

I haven't looked to see how far back our attributes go; am open to this on the next major release.