Enable implicit vector conversions

Author: aaronj0

test/test_conversions.py

@@ -15,7 +15,6 @@ def setup_class(cls):
         import cppyy
         cls.conversion = cppyy.load_reflection_info(cls.test_dct)
 
-    @mark.xfail(run=False, reason="Crashes")
     def test01_implicit_vector_conversions(self):
         """Test implicit conversions of std::vector"""