upgrading prereqs

Author: Naor Livne

requirements.txt

@@ -1,16 +1,16 @@
 backports.ssl-match-hostname==3.5.0.1
-certifi==2018.10.15
+certifi==2018.11.29
 chardet==3.0.4
-dnspython==1.15.0
-docker==3.5.1
-docker-pycreds==0.3.0
+dnspython==1.16.0
+docker==3.7.0
+docker-pycreds==0.4.0
 freeze==1.0.10
-idna==2.7
+idna==2.8
 ipaddress==1.0.22
-NebulaPythonSDK==2.0.0
+NebulaPythonSDK==2.0.2
 psutil==5.5.0
-requests==2.20.0
+requests==2.21.0
 retrying==1.3.3
-six==1.11.0
-urllib3==1.24
+six==1.12.0
+urllib3==1.24.1
 websocket-client==0.54.0