Add a flag to control whether DocumentSnapshots return Dates or Timestamps for timestamp fields (#831)

* add a new property `timestampsInSnapshotsEnabled` to `FirestoreSettings`, `false` by default;
* add a verbose warning message urging users to opt into the new behavior;
* set `timestampsInSnapshotsEnabled` to true in the integration tests to reduce the verbose console
spam during the test run and make sure the flag won't break anything once it's flipped.

1 files changed, 1 insertions, 1 deletions

diff --git a/Firestore/Source/Remote/FSTSerializerBeta.mm b/Firestore/Source/Remote/FSTSerializerBeta.mm
index 9531ddc..3a22a3f 100644
--- a/Firestore/Source/Remote/FSTSerializerBeta.mm
+++ b/Firestore/Source/Remote/FSTSerializerBeta.mm
@@ -191,7 +191,7 @@ NS_ASSUME_NONNULL_BEGIN
     return [self encodedString:[fieldValue value]];
 
   } else if (fieldClass == [FSTTimestampValue class]) {
-    return [self encodedTimestampValue:((FSTTimestampValue *)fieldValue).internalValue];
+    return [self encodedTimestampValue:[fieldValue value]];
 
   } else if (fieldClass == [FSTGeoPointValue class]) {
     return [self encodedGeoPointValue:[fieldValue value]];