* [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
* react-test-renderer: copy existing to v15
* react-test-renderer: update to v16 API
* react-test-renderer/shallow: update to v16 API
* react-test-renderer: fix lint, path mappings