Bump cloud_firestore and firebase_core versions

Author: jt274

packages/firebase_ui_firestore/example/pubspec.yaml

@@ -30,9 +30,9 @@ dependencies:
   flutter:
     sdk: flutter
   firebase_ui_firestore: ^1.7.2
-  cloud_firestore: ^5.6.9
+  cloud_firestore: ^6.0.0
   cupertino_icons: ^1.0.6
-  firebase_core: ^3.14.0
+  firebase_core: ^4.0.0
 dev_dependencies:
   drive: ^1.0.0-1.0.nullsafety.5
   flutter_test:

packages/firebase_ui_firestore/pubspec.yaml

@@ -8,7 +8,7 @@ environment:
   flutter: ">=3.3.0"
 
 dependencies:
-  cloud_firestore: ^5.6.9
+  cloud_firestore: ^6.0.0
   firebase_ui_localizations: ^1.14.0
   firebase_ui_shared: ^1.4.1
   flutter: