testing/py3-xapp: new aport
url: https://github.com/linuxmint/python3-xapp
dependencies according to: https://github.com/linuxmint/python3-xapp/blob/master/debian/control#L17
url: https://github.com/linuxmint/python3-xapp
dependencies according to: https://github.com/linuxmint/python3-xapp/blob/master/debian/control#L17