[eslint] no-multiple-empty-lines

.eslintrc.js

         'no-array-constructor': 2,
         'no-inline-comments': 0,
         'no-mixed-spaces-and-tabs': 2,
+        'no-multiple-empty-lines': 2,
         'no-negated-condition': 2,
         'no-nested-ternary': 0,
         'no-new-object': 2,

modules/xmpp/strophe.jingle.js

 }
 
 
-
 module.exports = function(XMPP, eventEmitter) {
     Strophe.addConnectionPlugin('jingle',
         new JingleConnectionPlugin(XMPP, eventEmitter));