Typed RegressionHead (#1042)
Typed RegressionHead (#1042)

* Update heads.py

* Update heads.py

Co-authored-by: Haifeng Jin <ede8d43d19e8ba6abed6716c19d60d7101154511@gmail.com>
keras-team/autokeras,keras-team/autokeras,keras-team/autokeras