fix tests

Author: felixdorn

src/Exceptions/TwitterException.php

@@ -6,7 +6,7 @@
 
 class TwitterException extends \Exception
 {
-    private const PRETTY_PRINT_FLAGS = JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE;
+    public const PRETTY_PRINT_FLAGS = JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE;
 
     protected function __construct(string $message)
     {

tests/TwitterExceptionTest.php

@@ -34,7 +34,7 @@
         ]))
     );
 
-    expect($exception)->getMessage()->toBe(json_encode($error, JSON_PRETTY_PRINT));
+    expect($exception)->getMessage()->toBe(json_encode($error, TwitterException::PRETTY_PRINT_FLAGS));
 });
 
 it('can handle 429s', function () {