ctr: snapshot->snapshots cmd, add aliases

Signed-off-by: Jess Valarezo <valarezo.jessica@gmail.com>

cmd/ctr/commands/plugins/plugins.go

@@ -18,8 +18,9 @@ import (
 
 // Command is a cli command that outputs plugin information
 var Command = cli.Command{
-	Name:  "plugins",
-	Usage: "provides information about containerd plugins",
+	Name:    "plugins",
+	Aliases: []string{"plugin"},
+	Usage:   "provides information about containerd plugins",
 	Flags: []cli.Flag{
 		cli.BoolFlag{
 			Name:  "quiet,q",