Prod Release 3.0.0

Major refactoring for milestone updates (Breaking Changes)

Now api does not do automatic adjustment of the milestones when a milestone is updated (updates which affect other milestones of the timeline e.g. marking a milestone active or completed or changing its duration). This effort is inline with our overall v5 efforts where we want the API to be as RESTful as it can be, without any business logic. After this change, it is the client (caller of the api) responsibility for making sure the correct order and dates of the milestones and send all milestones, that client thinks should be updated, in single bulk patch call which is introduced in this release.