Merge pull request #947 from adamtheturtle/mypyc

Add mypyc

Author: adamtheturtle

dev-requirements.txt

@@ -9,6 +9,7 @@ flake8-quotes==1.0.0  # Require single quotes
 flake8==3.6.0  # Lint
 isort==4.3.4  # Lint imports
 mypy==0.660  # Type checking
+mypy-mypyc==0.660  # Type checking
 pip_check_reqs==2.0.3
 pydocstyle==3.0.0  # Lint docstrings
 pyenchant==2.0.0  # Bindings for a spellchecking sytem