test: Add tests for getting headers and reason in Response class

- Added test for getting headers in Response class
- Added test for getting reason in Response class

tests/Foundation/ResponseTest.php

@@ -197,6 +197,16 @@
         ->header('Content-Type')->toBe('application/json');
 })->group(__DIR__, __FILE__);
 
+it('can get headers', function (): void {
+    expect(Response::fromPsrResponse(new \GuzzleHttp\Psr7\Response(200, ['Content-Type' => 'application/json'])))
+        ->headers()->toBeArray();
+})->group(__DIR__, __FILE__);
+
+it('can get reason', function (): void {
+    expect(Response::fromPsrResponse(new \GuzzleHttp\Psr7\Response(200, ['Content-Type' => 'application/json'])))
+        ->reason()->toBeString();
+})->group(__DIR__, __FILE__);
+
 it('can get effective uri', function (): void {
     expect(Response::fromPsrResponse(new \GuzzleHttp\Psr7\Response(200, ['Content-Type' => 'application/json'])))
         ->effectiveUri()->toBeNull();