bump requirements

also pyup ignore awscli and botocore because that complex mesh of
dependency hell doesn't play will with pyup opening a new PR every time
that botocore/awscli update (every few days)

requirements_for_test.txt

@@ -1,13 +1,13 @@
 -r requirements.txt
 flake8==3.5.0
-pytest==3.8.0
-moto==1.3.5
+pytest==3.9.1
+moto==1.3.6
 pytest-env==0.6.2
 pytest-mock==1.10.0
 pytest-cov==2.6.0
-pytest-xdist==1.23.0
-coveralls==1.5.0
-freezegun==0.3.10
+pytest-xdist==1.23.2
+coveralls==1.5.1
+freezegun==0.3.11
 requests-mock==1.5.2
 # optional requirements for jsonschema
 strict-rfc3339==0.7