[REQ] Run static checker on generated python code

[spacether]

Is your feature request related to a problem? Please describe.

More an opportunity than a problem. Static type analysis is getting more popular in python. This complements testing in helping reduce bugs in the generated code. Additionally it will help make sure that the generated code is typed in a way that helps consumers with their own static analysis.

Describe the solution you'd like

Now that the python-experimental branch doesn't' support python 2 it's possible to run mypy (static analysis) on the code as part of tox. This would require a number of fixes/changes to be applied to the generator to get it working

Describe alternatives you've considered

There are a number of other type checkers available for python but mypy seems the most common at this time

[spacether]

One can add missing types from 3rd party packages with:

          - "types-python-dateutil"
          - "types-frozendict"
          - "types-typing-extensions"
          - "types-urllib3"

Per dominodatalab/python-domino@14ff565
thank you @ddl-olsonJD

[spacether]

The upcoming v3 release will be closer to being able to run mypy

• generic types were added in v3 adds generic type info to schema classes/properties/items #174
• many vscode pylance basic type errors were fixed in v3 fixes type errors #175

[spacether]

resolved by 3.0.0 release