stricter mypy config

mypy.ini

# see https://mypy.readthedocs.io/en/stable/config_file.html#the-mypy-configuration-file
# this makes things more strict and enforces checking non-annotated code

[mypy]
# to keep things clean
warn_redundant_casts = True
warn_unused_ignores = True

# Workaround for bug in MyPy
disallow_subclassing_any = False

# enable these for even more strictness
disallow_untyped_calls = False
disallow_untyped_defs = False

# this will enable checks even for non-annotated methods
check_untyped_defs = True
warn_return_any = True
no_implicit_optional = True
strict_optional = True

# this helps when working with untyped libraries
ignore_missing_imports = True

# depends on the project
namespace_packages = True
explicit_package_bases = True