Merge branch 'fei-util-proto' of https://github.com/firebase/firebase-js-sdk into fei-util-proto

Feiyang1 · Feiyang1 · commit 0df9205c1dc5 · 2020-10-27T14:05:37.000-07:00
diff --git a/.changeset/fuzzy-impalas-brake.md b/.changeset/fuzzy-impalas-brake.md
@@ -0,0 +1,5 @@
+---
+"@firebase/util": patch
+---
+
+Do not merge `__proto__` in `deepExtend` to prevent `__proto__` pollution.
