v0.1-rc1-jdk13

This is a pre-release and it is only compatible with JDK 13! (For the moment!)

1. Create a config file such as qr-cli.sh
   1.1 Should contain the command to run a jar such as java -jar path/bash/file

2. Start plugin with CLightning
   lightning-cli plugin start /home/vincent/Github/qr-cli/qr-cli.sh

Now you can require a node URL to connect with the RPC method called peer-url or you can see the QR code of invoice when the caller use the normal invoice method