Update `request` module from 2.30.0 to 2.34.0

David-dm was yelling at me because `request` module version was
outdated.

The changelog doesn't seem to have anything that would break the
RestAdapter:

https://github.com/mikeal/request/blob/master/CHANGELOG.md
Merge pull request #330 from rendrjs/update-request-version

Update `request` module from 2.30.0 to 2.34.0