Version 0.80

• bumped signal-cli to version 0.12.7
• changing the group name is now possible - thanks to @kxait
• reworked json-rpc mode + fixed bug in websocket handling
• it is now possible to link devices in json-rpc mode - thanks to @kxait
• it is now possible to register a new phone number in json-rpc mode
• added endpoint /v1/accounts which lists all available accounts - thanks to @kxait
• use JRE instead of JDK for the runtime container (reduces the docker image size) - thanks to @marvinruder
• fixed a typo in the code - thanks to @charles37
• spoilers are now supported in text_mode: styled
• added /v1/rate-limit-challenge endpoint