But I noticed in the Chrome console as I started integrating that it has a dependency on Object.observe, which is scheduled for removal soon. Are there any plans to replace that code with (say) code using Proxy, or should we use a shim like https://github.com/MaxArt2501/object-observe?
No worries. It’s just that this forum software that we use doesn’t send us notifications that often, so it might take a longer time to get a response in here than on GitHub or on the Gitter chat.