fix(command): use command.opts() over command._events

command._events is a hidden property, which got changed recently, instead use command.opts() which
returns the right values

Closes #604

src/Command/index.js

@@ -63,14 +63,14 @@ class Command {
     const self = this
     const args = _.toArray(arguments)
     const paramsLength = this.args.length
-    const commandOptions = args[paramsLength]
+    const commandOptions = args[args.length - 1]
     const params = {}
     const options = {}
     _.each(_.take(args, paramsLength), (value, index) => {
       params[this.args[index].name] = value || null
     })
-    _.each(commandOptions._events, (option, name) => {
-      options[name] = commandOptions[name] || commandOptions[_.camelCase(name)] || null
+    _.each(commandOptions.opts(), (option, name) => {
+      options[name] = commandOptions[name] || null
     })
     this.setup()
     co(function * () {

test/unit/command.spec.js

@@ -238,6 +238,6 @@ describe('Command', function () {
     const controller = new ControllerGenerator()
     controller.run('new', ['awesome-project'], {'skip-install': true})
     expect(commandData.args).deep.equal({name: 'awesome-project'})
-    expect(commandData.options).deep.equal({'skip-install': true})
+    expect(commandData.options).deep.equal({skipInstall: true})
   })
 })