Suppress deprecated notices in PHP 8.1 (#111)

Author: techi602

src/CompoundDocument.php

@@ -19,6 +19,7 @@ public function __construct(PrimaryData $data, Included $included, DataDocumentM
         $this->doc = combine($data, $included, ...$members);
     }
 
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->doc;

src/DataDocument.php

@@ -18,6 +18,7 @@ public function __construct(PrimaryData $data, DataDocumentMember ...$members)
         $this->value = combine($data, ...$members);
     }
 
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->value;

src/ErrorDocument.php

@@ -20,6 +20,7 @@ public function __construct(ErrorDocumentMember ...$members)
         }
     }
 
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->obj;

src/MetaDocument.php

@@ -13,6 +13,7 @@ public function __construct(Meta $meta, MetaDocumentMember ...$members)
         $this->doc = combine($meta, ...$members);
     }
 
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->doc;