Changed version of dependency on Ray (guessing 0.8.6 caused the build to
fail on Travis).
@@ -24,7 +24,7 @@ axonserver_requires = ["axonclient<=0.0.99999"]
grpc_requires = ["grpcio<=1.29.99999"]
-ray_requires = ["ray<=0.8.99999", "psutil", "setproctitle"]
+ray_requires = ["ray<=0.8.5", "psutil", "setproctitle"]
thespian_requires = ["thespian<=3.10.99999"]
