Hi @matthewmcneely, this change was required to fix a bug that was reported hence it went into the patch release. You can read more about the bug that is being fixed in this post @id directive and interfaces - #3 by jcsrb.
It is a breaking change as mentioned in the PR and we should have done a better job at mentioning this in the release notes. Thanks for bringing this to our notice and we’ll make sure to take care of this in the future. In the meantime, you can still get your queries to work by changing them to a
queryPerson(filter: email: { in: ["foo@bar.com"] }) type of query.