Update __init__.py

Author: nicknelson1021

pandas_datareader/compat/__init__.py

@@ -6,7 +6,7 @@
 import pandas as pd
 from pandas.api.types import is_list_like, is_number
 import pandas.io.common as com
-from pandas.util.testing import assert_frame_equal
+from pandas.testing import assert_frame_equal
 
 PANDAS_VERSION = LooseVersion(pd.__version__)