Add changeset

wilhuff · wilhuff · commit 3dca7caae8cf · 2021-01-26T14:43:44.000-08:00
diff --git a/.changeset/silent-cars-burn.md b/.changeset/silent-cars-burn.md
@@ -0,0 +1,7 @@
+---
+'@firebase/firestore': patch
+---
+
+handle `ignoreUndefinedProperties` in `set({ merge: true })`. Previously this
+would behave as if the undefined value were `FieldValue.delete()`, which wasn't
+intended.
