Fix calling upWhile method form wrong module

One-liner fix again, this one broke typing in sandbox, possibly introduced in [this commit](https://github.com/alohaeditor/Aloha-Editor/commit/51150331ea619be4492e1dc1f7b5a6865e126932).

Could be fixed either the way i did it or by defining dependency on `dom/traversing` in `traversing` and passing the `upWhile` method, but for what?

Also since Aloha team uses tabs i had to add a local vimrc file to gitignore.