Fixed from_date and to_date to be timezone aware, closes #193

tests/test_empty_library_4_0.py

@@ -29,13 +29,6 @@ def test_db_version():
     assert photosdb.db_version == "4025"
 
 
-def test_os_version():
-    import osxphotos
-
-    (_, major, _) = osxphotos.utils._get_os_version()
-    assert major in osxphotos._constants._TESTED_OS_VERSIONS
-
-
 def test_persons():
     import osxphotos
     import collections