Add workaround for python/mypy#8627. Fixes jaraco/skeleton#18.

jaraco · jaraco · commit 52f39d2608db · 2020-05-23T11:57:41.000-04:00
diff --git a/setup.cfg b/setup.cfg
@@ -29,6 +29,8 @@ testing =
 	pytest-black >= 0.3.7
 	pytest-cov
 	pytest-mypy
+	# workaround for python/mypy#8627
+	mypy@git+https://github.com/python/mypy
 
 	# local
 
