Recognize "--help" as valid global option

cli/cli.go

@@ -52,7 +52,7 @@ func parseArgs(args []string) (string, []string) {
 		command = args[0]
 		args = args[1:]
 
-		if command == "-h" {
+		if command == "-h" || command == "--help" {
 			command = "help"
 		}
 	}

cli/cli_test.go

@@ -44,6 +44,7 @@ func TestCLI_Run(t *testing.T) {
 	}{
 		{[]string{}, 1, helpCmd},
 		{[]string{"-h"}, 0, helpCmd},
+		{[]string{"--help"}, 0, helpCmd},
 		{[]string{"wow", "-v"}, 0, verCmd},
 		{[]string{"version"}, 0, verCmd},
 		{[]string{"foo"}, 0, fooCmd},