Update CHANGELOG for Firestore v1.0.0 (#2266)

wilhuff · web-flow · commit 2ea8d010c436 · 2019-01-15T15:34:46.000-08:00
diff --git a/Firestore/CHANGELOG.md b/Firestore/CHANGELOG.md
@@ -1,4 +1,6 @@
 # Unreleased
+
+# v1.0.0
 - [changed] The `areTimestampsInSnapshotsEnabled` setting is now enabled by
   default so timestamp fields read from a FIRDocumentSnapshot will be returned
   as FIRTimestamp objects instead of NSDate. Any code expecting to receive an
