Sync typeshed (to release-mypy-0.520 branch in typeshed repo)

Guido van Rossum · Guido van Rossum · commit 1cdae381732f · 2017-07-18T13:52:35.000-07:00
diff --git a/typeshed b/typeshed
@@ -1 +1 @@
-Subproject commit 0e26c1f9361bd2d57b9f361c4fbd8185243afb21
+Subproject commit 75d4e1a563a3cde7e8c5e1c5050f13947f993e57
