Can the pulling of the `MilestoneNumber` for the "current" milestone come from the packages.json file? Ideally it would come from what ever Milestone is called `vNext` but its probably not worth the effort. 

In the future we probably could have have the one permeant milestone called `vNext` and when we release move all issues from it to one specific for the release but we don't have that atm. Currently, we rename the milestone.

Putting the milestone number in the packages.json would give us flexibility to go either way. What you think?