Log Message:
py-mypy: updated to 0.670

Mypy 0.670:
New Feature: Variable Redefinition
Stubgen Improvements
Other Improvements
- Expand getting started docs to discuss type hints in more detail
- Always infer in operator as returning bool
- Allow star args in ctypes.Array constructor
- Fix plugin invocation for __call__ methods
- Implement the XDG directory spec for config files: \ 
$XDG_CONFIG_HOME/mypy/config is now included in the search path for config files
- When using the --junit-xml flag, the Python version and platform in the \ 
junit.xml file are now formatted as mypy-py3_6-windows — previously this was \ 
mypy-py3.6-windows but the dot was misinterpreted by some tools
- Update the typed_ast dependency to version 1.3.1; this means we now officially \ 
support Python 3.7
- Temporarily delete pyproject.toml from the repo in order to work around a pip bu g
- Include mypy_bootstrap.ini in PyPI packages