CLN: move infer_dtype to pandas.api.types (pandas-dev#16023)

Author: jreback

pandas/__init__.py

@@ -79,7 +79,7 @@
                         moved={'Timestamp': 'pandas.Timestamp',
                                'Timedelta': 'pandas.Timedelta',
                                'NaT': 'pandas.NaT',
-                               'infer_dtype': 'pandas.api.lib.infer_dtype'})
+                               'infer_dtype': 'pandas.api.types.infer_dtype'})
 tslib = _DeprecatedModule(deprmod='pandas.tslib',
                           moved={'Timestamp': 'pandas.Timestamp',
                                  'Timedelta': 'pandas.Timedelta',

pandas/api/lib/__init__.py

@@ -2,4 +2,5 @@
 
 from pandas.core.dtypes.api import *  # noqa
 from pandas.core.dtypes.concat import union_categoricals  # noqa
+from pandas._libs.lib import infer_dtype  # noqa
 del np  # noqa

pandas/api/types/__init__.py

@@ -30,7 +30,7 @@ class TestTypes(Base, tm.TestCase):
                'is_dict_like', 'is_iterator', 'is_file_like',
                'is_list_like', 'is_hashable',
                'is_named_tuple', 'is_sequence',
-               'pandas_dtype', 'union_categoricals']
+               'pandas_dtype', 'union_categoricals', 'infer_dtype']
 
     def test_types(self):