update movie, tvshow

lib/data/tvshows.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:intl/intl.dart';
 
 import 'package:flutter/material.dart';
@@ -37,6 +39,13 @@ class Season {
         seasonID: int.parse(json['seasonID']),
         state: json['state']);
   }
+
+  Map toJson() =>
+      {
+        'seasonNumber': seasonNumber.toString(),
+        'seasonID': seasonID.toString(),
+        'state': state,
+      };
 }
 
 class TVShow {