v4.1.0-rc1

This is a release candidate because there are a large number of changes without the corresponding large volume of testing, but we have confidence that it is an improvement over v4.0.2 in any case. Please report any feedback immediately in in the #geodesic channel in the Cloud Posse Slack workspace. (Invitations available here.)

Released as v4.1.0

https://github.com/cloudposse/geodesic/releases/tag/4.1.0