Try to fix 3.6 tests

Author: DifferentialOrange

tarantool/__init__.py

@@ -32,7 +32,7 @@
     ENCODING_DEFAULT,
 )
 
-from tarantool.msgpack_ext.types import (
+from tarantool.msgpack_ext.types.datetime import (
     Datetime,
 )
 

tarantool/msgpack_ext/__init__.py

@@ -1,4 +1,4 @@
-from tarantool.msgpack_ext.types import Datetime
+from tarantool.msgpack_ext.types.datetime import Datetime
 
 EXT_ID = 4
 

tarantool/msgpack_ext/datetime.py

@@ -3,7 +3,7 @@
 from msgpack import ExtType
 import pandas
 
-import tarantool.msgpack_ext.types as types
+from tarantool.msgpack_ext.types.datetime import Datetime
 
 import tarantool.msgpack_ext.decimal as ext_decimal
 import tarantool.msgpack_ext.uuid as ext_uuid
@@ -12,7 +12,7 @@
 encoders = [
     {'type': Decimal,          'ext': ext_decimal },
     {'type': UUID,             'ext': ext_uuid    },
-    {'type': types.Datetime,   'ext': ext_datetime},
+    {'type': Datetime,         'ext': ext_datetime},
     {'type': pandas.Timestamp, 'ext': ext_datetime},
 ]