urllib bump to 1.23

Author: previ

requirements_stub.txt

@@ -37,6 +37,6 @@ tensorboard==1.11.0
 tensorflow==1.11.0
 termcolor==1.1.0
 tinydb==3.12.1
-urllib3==1.22
+urllib3==1.23
 Werkzeug==0.14.1
 setuptools==39.1.0