* Refactor initializing tracing-subscriber
* Revert "Refactor initializing tracing-subscriber"
This reverts commit 0876260bf9 in favor of tracing_subscriber::registry.
* Use EnvFilter::try_from_default_env in chat example
* Use EnvFilter::try_from_default_env in examples
* Rename Fallback::Custom to Fallback::Service
* Allow Routers to inherit state
* Rename Router::{nest => nest_service} and add new nest method for Routers
* Fix lints
* Add basic tests for state inheritance
* Changelog