Update pylintrc

pylint throws false positive no-member errors because the class is overridden
in pygobject and pylint seem not to pick up on this

pylintrc

@@ -140,7 +140,7 @@ ignore-mixin-members=yes
 # List of class names for which member attributes should not be checked (useful
 # for classes with dynamically set attributes). This supports the use of
 # qualified names.
-ignored-classes=optparse.Values,thread._local,_thread._local
+ignored-classes=optparse.Values,thread._local,_thread._local,gi.repository.GLib.Error
 
 # List of module names for which member attributes should not be checked
 # (useful for modules/projects where namespaces are manipulated during runtime