Bump mypy from 0.780 to 0.781
Bump mypy from 0.780 to 0.781

Bumps [mypy](https://github.com/python/mypy) from 0.780 to 0.781.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](https://github.com/python/mypy/compare/v0.780...v0.781)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
srittau/eventstreamd,srittau/eventstreamd