No need to pin importlib_resource any more

Fixes hamcrest#236

Author: offbyone

tox.ini

@@ -152,7 +152,6 @@ commands =
 basepython = python3.12
 deps = 
     towncrier
-    importlib_resources<6  # TODO: remove once twisted/towncrier#528 is released
 skip_install = true
 commands = towncrier --draft