update: Re-write update command.

config-version-main.go

@@ -47,14 +47,12 @@ func mainConfigVersion(ctx *cli.Context) {
 
 	// convert interface{} back to its original struct
 	newConf := config
-	type Version struct {
-		Value string `json:"value"`
-	}
+	type Version string
 	if globalJSONFlag {
 		tB, e := json.Marshal(
 			struct {
 				Version Version `json:"version"`
-			}{Version: Version{newConf.Version}},
+			}{Version: Version(newConf.Version)},
 		)
 		fatalIf(probe.NewError(e), "Unable to construct version string.", nil)
 		Println(string(tB))