JSON config file.
This new version is using a JSON file for config instead of a .env file, the default location for the file is now %APPDATA%\jellyfin-rpc\main.json
on Windows and $XDG_CONFIG_HOME/jellyfin-rpc/main.json
on linux/macOS, look at this ArchWiki page if the environment variable is unset.
Feature requests
Full Changelog: 0.7.0...0.8.0