chore: fix seralization (#851)

Author: manisha1997

src/Twilio/Rest/Accounts/V1/BulkConsentsList.php

@@ -54,7 +54,7 @@ public function create(array $items): BulkConsentsInstance
 
         $data = Values::of([
             'Items' =>
-                Serialize::map($items,function ($e) { return $e; }),
+                Serialize::map($items,function ($e) { return Serialize::jsonObject($e); }),
         ]);
 
         $headers = Values::of(['Content-Type' => 'application/x-www-form-urlencoded' ]);

src/Twilio/Rest/Accounts/V1/BulkContactsList.php

@@ -54,7 +54,7 @@ public function create(array $items): BulkContactsInstance
 
         $data = Values::of([
             'Items' =>
-                Serialize::map($items,function ($e) { return $e; }),
+                Serialize::map($items,function ($e) { return Serialize::jsonObject($e); }),
         ]);
 
         $headers = Values::of(['Content-Type' => 'application/x-www-form-urlencoded' ]);

src/Twilio/Rest/Events/V1/SubscriptionList.php

@@ -65,7 +65,7 @@ public function create(string $description, string $sinkSid, array $types, array
             'SinkSid' =>
                 $sinkSid,
             'Types' =>
-                Serialize::map($types,function ($e) { return $e; }),
+                Serialize::map($types,function ($e) { return Serialize::jsonObject($e); }),
             'ReceiveEventsFromSubaccounts' =>
                 Serialize::booleanToString($options['receiveEventsFromSubaccounts']),
         ]);

src/Twilio/Rest/FlexApi/V1/PluginConfigurationList.php

@@ -61,7 +61,7 @@ public function create(string $name, array $options = []): PluginConfigurationIn
             'Name' =>
                 $name,
             'Plugins' =>
-                Serialize::map($options['plugins'], function ($e) { return $e; }),
+                Serialize::map($options['plugins'], function ($e) { return Serialize::jsonObject($e); }),
             'Description' =>
                 $options['description'],
         ]);

src/Twilio/Rest/Proxy/V1/Service/SessionList.php

@@ -74,7 +74,7 @@ public function create(array $options = []): SessionInstance
             'Status' =>
                 $options['status'],
             'Participants' =>
-                Serialize::map($options['participants'], function ($e) { return $e; }),
+                Serialize::map($options['participants'], function ($e) { return Serialize::jsonObject($e); }),
         ]);
 
         $headers = Values::of(['Content-Type' => 'application/x-www-form-urlencoded' ]);

src/Twilio/Rest/Verify/V2/Service/Entity/ChallengeList.php

@@ -77,7 +77,7 @@ public function create(string $factorSid, array $options = []): ChallengeInstanc
             'Details.Message' =>
                 $options['detailsMessage'],
             'Details.Fields' =>
-                Serialize::map($options['detailsFields'], function ($e) { return $e; }),
+                Serialize::map($options['detailsFields'], function ($e) { return Serialize::jsonObject($e); }),
             'HiddenDetails' =>
                 Serialize::jsonObject($options['hiddenDetails']),
             'AuthPayload' =>