Mark it the change as breaking.
[package]
# Note: some of these values are also used when building Debian packages below.
name = "routinator"
-version = "0.9.1-dev"
+version = "0.10.0-dev"
edition = "2018"
authors = ["The NLnet Labs RPKI Team <rpki@nlnetlabs.nl>"]
description = "An RPKI relying party software."
