Bump gateway version to 0.8.3

New gateway version includes updated queue-worker interface.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

docker-compose.yml

@@ -3,7 +3,7 @@ services:
     gateway:
         ports:
             - 8080:8080
-        image: functions/gateway:0.8.2
+        image: functions/gateway:0.8.3
         networks:
             - functions
         environment: