Simple-Mail Qt library 2.3 released

SimpleMail is a small Qt library for sending mails, this release makes sure it compiles fine with Qt6, and has some small issues fixed.

I thought this would give me a bit of work but was mostly changing CMakeLists.txt and including one header.

This week I'll start working for KDAB :) and my first task will be porting one app to Qt6, so I decided to do a little of homework and port my own stuff first as you might have noticed (Cutelyst and ASql).