Since @alexeagle was concerned about editor support, I've manually tested this change within vscode - as expected, there are no changes required to vscode to make it work, you just drop in the new tsserver. 😉

Once this is merged and we do an LKG (so our lib folder has the feature), I'll update all of our own configs to make use of this feature - it'll seriously reduce the duplication in our options (and likely simplify our Gulpfile a lot!)