TST: fix py39 deprecation

toolz/tests/test_itertoolz.py::test_random_sample
toolz/tests/test_itertoolz.py::test_random_sample
toolz/tests/test_itertoolz.py::test_random_sample
toolz/tests/test_itertoolz.py::test_random_sample
  ../lib/python3.9/random.py:100: DeprecationWarning: Seeding based on hashing is deprecated
  since Python 3.9 and will be removed in a subsequent version. The only
  supported seed types are: None, int, float, str, bytes, and bytearray.
    self.seed(x)

explicitly hash the values before passing in

Author: tacaswell

toolz/tests/test_itertoolz.py

@@ -542,8 +542,8 @@ def test_random_sample():
 
     assert rsample1 != rsample2
 
-    assert mk_rsample(object) == mk_rsample(object)
-    assert mk_rsample(object) != mk_rsample(object())
+    assert mk_rsample(hash(object)) == mk_rsample(hash(object))
+    assert mk_rsample(hash(object)) != mk_rsample(hash(object()))
     assert mk_rsample(b"a") == mk_rsample(u"a")
 
     assert raises(TypeError, lambda: mk_rsample([]))