* Update JS package versions.
* Forgot to remove a debugging log statement.
* Figured out the peerDependency npm issues... react-scripts thought it needed an old version of typescript, which we don't even need.
* Re-work state broadcasting mechanism to prevent excessive data transmission.
* Tidy up delta parsing, handle failure to serialize state diffs.
* Apply diffs in batches and use immer to apply them in a simple way.
* Update frontend build.
* Update stale docstrings.
* Rebuild frontend.
* Delete a file that wasn't being used.
David Winings
116a60e404