fix: revert allow import from root without react-dom (pmndrs#521)

This reverts commit 4fd9cf1.

fix: allow merged instances to receive refs

fix: cycleraycast glitch

fix: update three-stdlib, adapt babel to CRA, fix cycleraycast's onch…

…anged

fix: stale events in instances/points

feat: event cycling, also (fix): instances/points patch event data's …

…object

fix: backwards compat for three-stdlib (pmndrs#555)

feat: usecursor

fix: add renderPriority option to GizmoHelper (pmndrs#550)

* fix: add renderPriority option to GizmoHelper

* docs: add renderPriority to docs

feat: bake shadows