Update node dependencies.

I can't update shrinkwrap at the moment. I keep getting

```
Running "_update-shrinkwrap" task
Warning: Problems were encountered
Please correct and try again.
invalid: readable-stream@1.0.33-1 C:\Users\xmr\Desktop\bootstrap\node_modules\grunt-contrib-qunit\node_modules\grunt-lib-phantomjs\node_modules\phantomjs\node_modules\request\node_modules\bl\node_modules\readable-stream Use --force to continue.

Aborted due to warnings.
```

I cleaned node_modules and everything but I still get the error.