new IRC channel home

Hi devs,

A few of us used to hang out in the #winphp-dev channel on Freenode. 
Since the recent changes there, I've created the same #winphp-dev 
channel on libera.chat  Please join!

  - connect directly in your browser: 
https://web.libera.chat/?channels=#winphp-dev

  - other connection options: https://libera.chat/guides/clients

-jeff