Sync typeshed (#4641)

msullivan · web-flow · commit 80c95ea6970b · 2018-02-26T15:51:16.000-08:00
diff --git a/typeshed b/typeshed
@@ -1 +1 @@
-Subproject commit 35d3effe03806a9b325ad656d20df0648ff2ffcd
+Subproject commit 9b6df1d6bcb367e6dfc8fc48737ff481001d8b97
