Uses Yargs instead of Command

Summary: This diff allows Metro to throw an error when a configuration file cannot be found, by using a new strict: true option.

Reviewed By: rafeca

Differential Revision: D6998613

fbshipit-source-id: b704633be18d5c007f1a022fa811d0a74c636fc9

local-cli/dependencies/dependencies.js

@@ -86,6 +86,7 @@ function dependencies(argv, config, args, packagerInstance) {
 
 module.exports = {
   name: 'dependencies',
+  description: 'lists dependencies',
   func: dependencies,
   options: [
     {