change volume name with generated deployment file

if volumes in docker file is defined as
      volumes:
        - .:/code
    Then the PVC created by kompose will containes .(dot) in it.
       .-persistentvolumeclaim.yaml

pkg/transformer/utils.go

@@ -97,7 +97,7 @@ func ParseVolume(volume string) (name, host, container, mode string, err error)
 }
 
 func isPath(substring string) bool {
-	return strings.Contains(substring, "/")
+	return strings.Contains(substring, "/") || substring == "."
 }
 
 // ConfigLabels configures label