Babel-eslint issue

`gulp serve`
[22:03:23] Using gulpfile ~/Desktop/ES6/es6-den/gulpfile.js
[22:03:23] Starting 'eslint'...
[22:03:23] Starting 'wiredep'...
[22:03:23] Finished 'wiredep' after 56 ms
[22:03:23] Starting 'less'...
[22:03:24] Starting 'images'...
[22:03:24] Starting 'fonts'...
[22:03:24] Finished 'images' after 149 ms
[22:03:24] Finished 'fonts' after 16 ms
TypeError: Cannot read property 'visitClass' of undefined
at monkeypatch (/Users/azahreba/Desktop/ES6/es6-den/node_modules/babel-eslint/index.js:199:40)

I'd suggest to update `"babel-eslint": "^4.1.8"`
Works fine for me.