V2 will be major
$ gpio -v
gpio version: 2.50
$ cd /tmp
$ wget https://project-downloads.drogon.net/wiringpi-latest.deb
$ sudo dpkg -i wiringpi-latest.deb
$ gpio -v
gpio version: 2.52rework fully supporting Pi4, Java11+....
Sneak preview via https://v2.pi4j.com/