Fixing nullable fields and converters (#624)

* Fixing nullable fields and converters

* Bump version

* Fix version

recipients_app/lib/core/helpers/document_reference_converter.dart

@@ -2,12 +2,12 @@ import "package:cloud_firestore/cloud_firestore.dart";
 import "package:json_annotation/json_annotation.dart";
 
 class DocumentReferenceConverter
-    implements JsonConverter<DocumentReference, dynamic> {
+    implements JsonConverter<DocumentReference, Object> {
   const DocumentReferenceConverter();
 
   @override
   DocumentReference fromJson(dynamic json) => json as DocumentReference;
 
   @override
-  dynamic toJson(DocumentReference documentReference) => documentReference;
+  Object toJson(DocumentReference documentReference) => documentReference;
 }

recipients_app/lib/core/helpers/timestamp_converter.dart

@@ -1,16 +1,16 @@
 import "package:cloud_firestore/cloud_firestore.dart";
 import "package:json_annotation/json_annotation.dart";
 
-class TimestampConverter implements JsonConverter<Timestamp?, dynamic> {
+class TimestampConverter implements JsonConverter<Timestamp, Object> {
   const TimestampConverter();
 
   @override
-  Timestamp? fromJson(dynamic json) {
-    return json as Timestamp?;
+  Timestamp fromJson(dynamic json) {
+    return json as Timestamp;
   }
 
   @override
-  dynamic toJson(Timestamp? object) {
+  Object toJson(Timestamp object) {
     return object;
   }
 }

recipients_app/pubspec.yaml

@@ -2,7 +2,7 @@ name: app
 description: Social Income App
 
 publish_to: "none"
-version: 1.1.8+22
+version: 1.1.8+23
 
 environment:
   sdk: ">=3.1.0 <4.0.0"