Hypothesis integration about ward

[Zac-HD]

The Hypothesis docs should make it pretty clear how to integrate with Hypothesis 😄

Beyond that, feel free to ping me for review or design discussion if that would help, I'm always delighted to get more open source projects set up with property-based testing!

[darrenburns]

Thanks @Zac-HD!

[hoefling]

@darrenburns does this issue mean that the docs listed under Using with Hypothesis are out of date? Running

from hypothesis import given
from hypothesis.strategies import lists, integers
from ward import test

@test("every list of integers contains the number 1")
@given(l=lists(elements=integers()))
def _(l):
    print(l)  # Let's print out the list to see what's happening!
    assert 1 in l

with ward==0.48.0b0, I get

File "/Users/hoefling/Library/Caches/pypoetry/virtualenvs/ward-QqO02Z9H-py3.8/lib/python3.8/site-packages/ward/testing.py", line 136, in run
  self.fn(**resolved_args)

TypeError: _() missing 1 required positional argument: 'l'

However, I recall hypothesis tests were functional some versions ago.