Bump mypy version

Author: domdfcoding

setup.cfg

@@ -6,12 +6,5 @@
 #     * mypy
 #     * options.entry_points
 
-[mypy]
-python_version = 3.6
-namespace_packages = True
-check_untyped_defs = True
-warn_unused_ignores = True
-no_implicit_optional = True
-
 [options.entry_points]
 flake8.extension = STRFTIME=flake8_strftime:Plugin

tox.ini

@@ -60,7 +60,7 @@ basepython = python3.6
 ignore_errors = True
 changedir = {toxinidir}
 deps =
-    mypy==0.812
+    mypy==0.910
     -r{toxinidir}/tests/requirements.txt
 commands = mypy flake8_strftime tests {posargs}