Fix expected failure on Python 3.4

Author: chrisburr

tests/test_parser.py

@@ -60,7 +60,7 @@ def test_3_deep_chain():
 
 
 @pytest.mark.slow
-@pytest.mark.xfail(sys.version_info <= (3, 4),
+@pytest.mark.xfail(sys.version_info < (3, 5),
                    reason='Other Python versions handle recursion less well',
                    raises=RecursionError)
 def test_5_deep_chain():