- Re-introduce PyGObject with more backwards compatible bounds. I should
explain here a little after all the backwards and forwards on this. Because
PyGObject has some system dependency issues, it looked impossible to include
it as a Python dependency here and not create issues for people who are
installing who may be relying on their system package manager installed
PyGObject. However, after speaking with Gtk devs, I have a set of bounds
which supports compatibility with older distributions with some fairly OK
guarantees. I want to include the dependencies here so people can just "pip
install trio-gtk" and hopefully get moving fast from there without having to
deal with system package manager installed packages.