better handling of importlib_resources

Author: bmcfee

resampy/filters.py

@@ -50,8 +50,9 @@
 
 try:
     # Try to import from the standard library first (Python >= 3.9)
+if sys.version_info < (3, 9)
     from importlib import resources as importlib_resources
-except ImportError:
+else:
     # Fall back to the backport
     import importlib_resources