Requires at least version 3.19 of PyGObject

issue10975
review376041002
(grafted from 635069187910e2914d0dc20a62d49903de67a6af)

--HG--
branch : 6.0

setup.py

@@ -152,7 +152,7 @@ dist = setup(name=name,
     install_requires=[
         'pycairo',
         "python-dateutil",
-        'PyGObject',
+        'PyGObject>=3.19',
         ],
     extras_require={
         'calendar': ['GooCalendar>=0.7'],