Respect node-glob's nonegate flag

node-glob has a bug where it does not respect negation at the start of the string: https://github.com/isaacs/node-glob/issues/62

The work-around is to respect the `nonegate` flag. This fix will allow `pickFiles` to pass that option. The default is the current behavior so will not have any backwards incompatibility issues.
The version number is added by the release script. Please remove (as we may have other updates to add before releasing).