Fix deprecation errors

Author: tobyzerner

src/Endpoint/Concerns/IncludesData.php

@@ -18,7 +18,7 @@ public function defaultInclude(array $include): static
         return $this;
     }
 
-    private function getInclude(Context $context, array $collections = null): array
+    private function getInclude(Context $context, ?array $collections = null): array
     {
         if ($includeString = $context->parameter('include')) {
             $include = $this->parseInclude($includeString);

src/Endpoint/Concerns/SerializesResourceDocument.php

@@ -33,7 +33,7 @@ protected function resourceDocumentParameters(): array
     private function serializeResourceDocument(
         mixed $data,
         Context $context,
-        array $collections = null,
+        ?array $collections = null,
     ): array {
         $collections ??= [$context->collection];
 

tests/feature/EndpointVisibilityTest.php

@@ -53,15 +53,15 @@ public static function endpointProvider(): array
     }
 
     #[DataProvider('endpointProvider')]
-    public function test_endpoint_forbidden(string $method, string $uri, array $body = null)
+    public function test_endpoint_forbidden(string $method, string $uri, ?array $body = null)
     {
         $this->expectException(ForbiddenException::class);
 
         $this->api->handle($this->buildRequest($method, $uri)->withParsedBody($body));
     }
 
     #[DataProvider('endpointProvider')]
-    public function test_endpoint_allowed(string $method, string $uri, array $body = null)
+    public function test_endpoint_allowed(string $method, string $uri, ?array $body = null)
     {
         $response = $this->api->handle(
             $this->buildRequest($method, $uri)