Proposed update to support MayaDT - MayaDT -> datetime.timedelta

tests/test_maya.py

@@ -285,6 +285,13 @@ def test_dunder_sub():
     assert now - timedelta(seconds=1) == now.subtract(seconds=1)
 
 
+def test_mayaDT_sub():
+    now = maya.now()
+    then = now.add(days=1)
+    assert then - now == timedelta(24*60*60)
+    assert now - then == timedelta(-24*60*60)
+
+
 def test_core_local_timezone(monkeypatch):
     @property
     def mock_local_tz(self):