Limit version of PyGObject installed from pip

the release notes say that they moved to girepository-2.0 in version 3.52.0 which isn't in most production versions of Linux

Author: ukBaz

setup.py

@@ -13,7 +13,7 @@
 
 here = path.abspath(path.dirname(__file__))
 
-required_packages = ['PyGObject']
+required_packages = ['PyGObject<3.52.0']
 extras_rel = ['bumpversion', 'twine']
 extras_doc = ['sphinx', 'sphinx_rtd_theme']
 extras_test = ['coverage', 'pycodestyle', 'python-dbusmock']