fix(prompter): resolve issue with new inquirer api (commitizen#18)

Author: Cameron Westland

index.js

@@ -3,28 +3,27 @@
 var wrap = require('word-wrap');
 
 // This can be any kind of SystemJS compatible module.
-// We use Commonjs here, but ES6 or AMD would do just 
+// We use Commonjs here, but ES6 or AMD would do just
 // fine.
 module.exports = {
 
   // When a user runs `git cz`, prompter will
   // be executed. We pass you cz, which currently
   // is just an instance of inquirer.js. Using
   // this you can ask questions and get answers.
-  // 
+  //
   // The commit callback should be executed when
   // you're ready to send back a commit template
-  // to git. 
-  // 
+  // to git.
+  //
   // By default, we'll de-indent your commit
   // template and will keep empty lines.
   prompter: function(cz, commit) {
-
     console.log('\nLine 1 will be cropped at 100 characters. All other lines will be wrapped after 100 characters.\n');
-    
+
     // Let's ask some questions of the user
-    // so that we can populate our commit 
-    // template. 
+    // so that we can populate our commit
+    // template.
     //
     // See inquirer.js docs for specifics.
     // You can also opt to use another input
@@ -77,8 +76,8 @@ module.exports = {
         name: 'footer',
         message: 'List any breaking changes or issues closed by this change:\n'
       }
-    ], function(answers) {
-      
+    ]).then(function(answers) {
+
       var maxLineWidth = 100;
 
       var wrapOptions = {