bump requirements

pyup ignore pytest until we sort all the fixtures as functions issues

requirements_for_test.txt

@@ -1,12 +1,12 @@
 -r requirements.txt
-flake8==3.7.5
-pytest==3.10.1
+flake8==3.7.6
 moto==1.3.7
+pytest==3.10.1  # pyup: <4
 pytest-env==0.6.2
 pytest-mock==1.10.1
 pytest-cov==2.6.1
 pytest-xdist==1.26.1
-coveralls==1.5.1
+coveralls==1.6.0
 freezegun==0.3.11
 requests-mock==1.5.2
 # optional requirements for jsonschema