Adopt Cobra completion v2 to support completion by CLI plugins

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

cli/command/node/list.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
+	"github.com/docker/cli/cli/command/completion"
 	"github.com/docker/cli/cli/command/formatter"
 	flagsHelper "github.com/docker/cli/cli/flags"
 	"github.com/docker/cli/opts"
@@ -31,6 +32,7 @@ func newListCommand(dockerCli command.Cli) *cobra.Command {
 		RunE: func(cmd *cobra.Command, args []string) error {
 			return runList(dockerCli, options)
 		},
+		ValidArgsFunction: completion.NoComplete,
 	}
 	flags := cmd.Flags()
 	flags.BoolVarP(&options.quiet, "quiet", "q", false, "Only display IDs")