Update docker-compose.1804.51.yaml (#145)

Author: weissi

docker/docker-compose.1804.51.yaml

@@ -7,7 +7,7 @@ services:
     build:
       args:
         ubuntu_version: "bionic"
-        swift_version: "5.1"
+        swift_version: "5.1.3"
 
   test:
     image: async-http-client:18.04-5.1