Clean up requirements and ignore warnings from dependencies in test output

Author: brandonwillard

requirements.txt

@@ -1,11 +1,10 @@
 scipy>=1.2.0
 Theano>=1.0.4
-gast==0.2.2
+pymc4 @ git+https://github.com/pymc-devs/pymc4.git@master#egg=pymc4-0.0.1
+tfp-nightly==0.9.0.dev20190908
 tf-nightly-2.0-preview==2.0.0.dev20190908
 tensorflow-estimator-2.0-preview==1.14.0.dev2019090801
-tfp-nightly==0.9.0.dev20190908
 pymc3>=3.6
-pymc4 @ git+https://github.com/pymc-devs/pymc4.git@master#egg=pymc4-0.0.1
 multipledispatch>=0.6.0
 unification>=0.2.2
 kanren @ git+https://github.com/pymc-devs/kanren.git@symbolic-pymc#egg=kanren-0.2.3

setup.cfg

@@ -6,4 +6,7 @@ add-ignore = D100,D101,D102,D103,D104,D105,D106,D107,D202
 convention = numpy
 
 [tool:pytest]
-python_functions=test_*
+python_functions=test_*
+filterwarnings =
+    ignore:the imp module is deprecated:DeprecationWarning:
+    ignore:Using a non-tuple sequence:FutureWarning:theano\.tensor