Replace mock package with unittest.mock

[Chronial]

From what I can see, this package does not support any version of python that does not come with mock in it's standardlib. Is there any reason not use that?

My main problem is that this lists mock as a requirement, which combined with pytest-dev/pytest-mock#54 now messes with my tests :).

[yakky]

@Chronial isn't mock in stdlib only for python 3.3+ and up?

[Chronial]

Oh, sorry – I must be doing to much python3 :). I for some reason thought it was also part of 2.7, but it is in fact not.

Would it be possible to only require mock on python2?

[yakky]

@Chronial choiould you check if #77 fixes the issue for you?

[Chronial]

Yes, that looks great, thx :).

[Chronial]

@yakky It looks like this doesn't actually work, because you uploaded a py2+py3 wheel to pypi that states that it requires mock. The easiest solution to this would probably be to just not provide a wheel.

[yakky]

@Chronial my bad, an error in setup.py, fixed in #82
0.9.7 wheel will fix that