use get_dummies instead of _get_dummies_1d

Author: clbarnes

pandas/core/arrays/categorical.py

@@ -537,9 +537,11 @@ def get_dummies(
         1  0.0  1.0  0.0
         2  0.0  0.0  1.0
         """
-        from pandas.core.reshape.reshape import _get_dummies_1d
+        # Would be better to use pandas.core.reshape.reshape._get_dummies_1d
+        # but that's internal and fails lints
+        from pandas import get_dummies
 
-        return _get_dummies_1d(
+        return get_dummies(
             self,
             prefix=prefix,
             prefix_sep=prefix_sep,