Version 0.94

• query parameters can now be accessed in the plugins mechanism (thanks @d-rk)
• added optional webhook mechanism to json-rpc mode (see RECEIVE_WEBHOOK_URL env. variable)
• updated signal-cli to version 0.13.18
• the group link state can now be set via the groups PUT request
• added view_once parameter to the /v2/send endpoint (be aware: this parameter can only be used when sending images!)
• added env variables to ignore the download of attachments and stories in json-rpc mode
• Signal usernames can now be used in the groups POST/PUT endpoints