* [react] Use HTMLDialogElement for the dialog node
* Actually add the `open` property
* This update requires typescript 2.6
* Update dependents of react to also require typescript 2.6
* Add new package: react-hyperscript
* Type of function should be declared by function keyword...
* Add a workaround
tsc does not allow `export =`ing function because ES spec does not allow that.
But react-hyperscript does that.
So this workaround is required.