Merge pull request #2341 from python-trio/dependabot/pip/mypy-0.961

Author: pquentin

test-requirements.txt

@@ -58,7 +58,7 @@ mccabe==0.6.1
     # via
     #   flake8
     #   pylint
-mypy==0.960 ; implementation_name == "cpython"
+mypy==0.961 ; implementation_name == "cpython"
     # via -r test-requirements.in
 mypy-extensions==0.4.3 ; implementation_name == "cpython"
     # via