gplugin/gplugin

Prepare for the 0.36.0 release
v0.36.0
2021-10-14, Gary Kramlich
072159807045
Prepare for the 0.36.0 release

Testing Done:
Ran `ninja dist`

Reviewed at https://reviews.imfreedom.org/r/1050/
usr/include/gplugin-gtk4-1.0
debian/tmp/usr/lib/*/libgplugin-gtk4.so
debian/tmp/usr/lib/*/pkgconfig/gplugin-gtk4.pc
debian/tmp/usr/share/gir-1.0/GPluginGtk4-1.0.gir