Update to latest NUglify

[trullock]

Hi, your friendly maintainer of NUglify here.

The vast majority of issues I get are because BundlerMinifier doesn't use the latest NUglify.

NUglify obeys semver, so please update this project to depend on v1.x of NUglify, and people will then benefit from bugfixes automatically.

Many of the issues here are due to outdated NUglify, so we could prevent those too

Thanks