chore(deps): update dependency mypy to v0.950 (#347)

Author: renovate-bot

requirements-test.txt

@@ -7,7 +7,7 @@ sqlalchemy-pytds==0.3.4
 flake8==4.0.1
 flake8-annotations==2.7.0
 black==22.3.0
-mypy==0.942
+mypy==0.950
 sqlalchemy-stubs==0.4
 types-pkg-resources==0.1.3
 types-PyMySQL==1.0.18