Update py from 1.4.34 to 1.5.2

requirements.txt

@@ -8,7 +8,7 @@ freezegun==0.3.9
 packaging==16.8
 numpy==1.13.3
 psutil==5.4.1
-py==1.4.34
+py==1.5.2
 pyglet==1.2.4
 pyparsing==2.2.0
 pytest==3.2.3