Bump mypy

Author: PeterJCLaw

scripts/requirements-dev.txt

@@ -21,7 +21,7 @@ importlib-metadata==2.0.0  # via flake8, flake8-comprehensions
 isort==5.6.4              # via -r scripts/linting/requirements.in, flake8-isort
 mccabe==0.6.1             # via flake8
 mypy-extensions==0.4.3    # via mypy
-mypy==0.720               # via -r scripts/typing/requirements.in
+mypy==0.790               # via -r scripts/typing/requirements.in
 pycodestyle==2.6.0        # via flake8, flake8-debugger, flake8-todo
 pyflakes==2.2.0           # via flake8
 pygithub==1.43.8          # via -r scripts/requirements.txt
@@ -32,7 +32,7 @@ six==1.15.0               # via flake8-tuple
 termcolor==1.1.0          # via -r scripts/requirements.txt
 testfixtures==6.15.0      # via flake8-isort
 typed-ast==1.4.1          # via mypy
-typing-extensions==3.7.4  # via -r scripts/typing/requirements.in, mypy
+typing-extensions==3.7.4.3  # via -r scripts/typing/requirements.in, mypy
 urllib3==1.25.11          # via -r scripts/requirements.txt, requests
 wrapt==1.12.1             # via -r scripts/requirements.txt, deprecated
 zipp==3.4.0               # via importlib-metadata