fix($cli): should output helper when did not input branch

Author: 2nthony

lib/index.js

@@ -27,6 +27,8 @@ module.exports = class Core {
       .usage('[...branches] [options]')
       .option('-r, --remotes', 'Delete remotes branches')
       .action((branches, options) => {
+        if (branches.length === 0) cli.outputHelp()
+
         this.deleteBranch(branches, options)
       })