Add React Native fix.

Michael Lehenbauer · Michael Lehenbauer · commit f19e49e82c2d · 2017-11-09T15:57:31.000-08:00
diff --git a/packages/firestore/CHANGELOG.md b/packages/firestore/CHANGELOG.md
@@ -1,4 +1,6 @@
 # Unreleased
+- [fixed] Fixed an "Image is not defined" error when using Cloud Firestore
+  from React Native. 
 - [changed] Network streams are automatically closed after 60 seconds of
   idleness.
 - [changed] We no longer log 'RPC failed' messages for expected failures.
