Ignore the imp PendingDeprecationWarning as well

Author: Gallaecio

pytest.ini

@@ -2,6 +2,7 @@
 filterwarnings =
     ; https://github.com/RDFLib/pyrdfa3/issues/31
     ignore:the imp module is deprecated:DeprecationWarning
+    ignore:the imp module is deprecated:PendingDeprecationWarning
     ; https://github.com/html5lib/html5lib-python/issues/402
     ; https://bugs.launchpad.net/beautifulsoup/+bug/1847592
     ignore:Using or importing the ABCs:DeprecationWarning