suppress bs4 DeprecationWarning, 'strip_cdata' option of HTMLParser

local/lib/python3.11/site-packages/bs4/builder/_lxml.py:124: DeprecationWarning: The 'strip_cdata' option of HTMLParser() has never done anything and will eventually be removed.

introduced in lxml 5.3.0, d31d21396c

tests/testutil.py

@@ -310,6 +310,9 @@ class TestCase(unittest.TestCase, testutil.Asserts):
         # suppress a few warnings
         # local/lib/python3.9/site-packages/bs4/__init__.py:435: MarkupResemblesLocatorWarning: The input looks more like a filename than markup. You may want to open this file and pass the filehandle into Beautiful Soup.
         warnings.filterwarnings('ignore', category=MarkupResemblesLocatorWarning)
+        # local/lib/python3.11/site-packages/bs4/builder/_lxml.py:124: DeprecationWarning: The 'strip_cdata' option of HTMLParser() has never done anything and will eventually be removed.
+        warnings.filterwarnings('ignore', category=DeprecationWarning,
+                                message="The 'strip_cdata' option of HTMLParser")
 
         # arroba config
         os.environ.update({