chore(requirements): update requests to 2.18.2

Author: mboersma

rootfs/requirements.txt

@@ -19,5 +19,5 @@ psycopg2==2.7.1
 pyldap==2.4.37
 pyOpenSSL==17.2.0
 pytz==2017.2
-requests==2.14.2
+requests==2.18.2
 requests-toolbelt==0.8.0