fixup! objc::unordered_map

wilhuff · wilhuff · commit 6525d5e9217d · 2019-03-25T19:53:26.000-07:00
diff --git a/Firestore/core/src/firebase/firestore/util/objc_compatibility.h b/Firestore/core/src/firebase/firestore/util/objc_compatibility.h
@@ -26,6 +26,7 @@
 #include <algorithm>
 #include <string>
 #include <type_traits>
+#include <unordered_map>
 
 #include "Firestore/core/src/firebase/firestore/util/string_apple.h"
 #include "Firestore/core/src/firebase/firestore/util/to_string.h"
