Update CHANGELOG for Firestore v1.1.0

wilhuff · wilhuff · commit 00dfc6074427 · 2019-03-11T15:57:04.000-07:00
diff --git a/Firestore/CHANGELOG.md b/Firestore/CHANGELOG.md
@@ -1,4 +1,6 @@
 # Unreleased
+
+# 1.1.0
 - [changed] Improved performance when querying over documents that contain
   subcollections.
 - [feature] Added `FieldValue.increment()`, which can be used in
