mypy self check: add python_version = 3.5 (#8382)

hauntsaninja · web-flow · commit c059437858a9 · 2020-02-07T14:54:39.000-08:00
diff --git a/mypy_self_check.ini b/mypy_self_check.ini
@@ -18,3 +18,4 @@ show_error_codes = True
 pretty = True
 always_false = MYPYC
 plugins = misc/proper_plugin.py
+python_version = 3.5
