Description

Remove codemirror dependency

Documentation problem

The current documentation demonstrates pandera usage by using the pa.PandasDtype enum, which can make things look a little unfamiliar to new-comers, especially since it now supports the use of python types and numpy scalar types, for example, see:

• documentation example: https://pandera.readthedocs.io/en/stable/#quick-start
• docstrings example: https://githu

We get the return annotation for free, so we should allow users to do something with it.