Testing with Python 3.14.0 shows this warning: ``` gitdb/test/db/test_ref.py::TestReferenceDB::test_writing gitdb/test/db/test_ref.py::TestReferenceDB::test_writing gitdb/test/db/test_ref.py::TestReferenceDB::test_writing gitdb/test/db/test_ref.py::TestReferenceDB::test_writing $(@D)/gitdb/db/ref.py:45: DeprecationWarning: codecs.open() is deprecated. Use open() instead. with codecs.open(self._ref_file, 'r', encoding="utf-8") as f: ```