Sync typeshed (#5108)

msullivan · emmatyping · commit b1982a17a86e · 2018-05-24T17:29:56.000-04:00
diff --git a/typeshed b/typeshed
@@ -1 +1 @@
-Subproject commit 709b193416afdcc2985c65f5f558e49eb38fdba5
+Subproject commit c55cf13d8ec843f9172ec91f399e11e7f42246e6
