Major Changes:

Yggdrasil now generates typed config to stream to Envoy, raising the officially supported version of Envoy to 1.12. #50

This means that Yggdrasil should also be sending config which is compatible with Envoy 1.13, but users may see deprecation warnings in this Envoy version for other config/features due to be removed in later versions.

Please see the Envoy docs for comprehensive details on deprecated features.