Merge pull request #1246 from VWS-Python/dependabot/pip/mypy-0.781

Bump mypy from 0.780 to 0.781

Author: adamtheturtle

dev-requirements.txt

@@ -15,7 +15,7 @@ flake8-quotes==3.2.0  # Require single quotes
 flake8==3.8.3  # Lint
 freezegun==0.3.15
 isort==4.3.21  # Lint imports
-mypy==0.780  # Type checking
+mypy==0.781  # Type checking
 pip_check_reqs==2.1.1
 pydocstyle==5.0.2  # Lint docstrings
 pyenchant==3.1.1  # Bindings for a spellchecking sytem