Add Ps() back into the interface

In case anyone was using it.

Author: christophergunn

DockerComposeFixture/Compose/IDockerCompose.cs

@@ -8,9 +8,10 @@ public interface IDockerCompose
     {
         void Init(string dockerComposeArgs, string dockerComposeUpArgs, string dockerComposeDownArgs);
         void Down();
+        IEnumerable<string> Ps();
         IEnumerable<string> PsWithJsonFormat();
         Task Up();
         int PauseMs { get; }
         ILogger[] Logger { get; }
     }
-}
+}