fix: code formatting

Author: ovx

src/BaseChallengeOptions.php

@@ -40,7 +40,7 @@ public function __construct(
 
         // Add a delimiter to prevent parameter splicing
         if (!str_ends_with($salt, ';')) {
-            $salt = $salt . ';';
+            $salt .= ';';
         }
 
         $this->salt = $salt;

tests/AltchaTest.php

@@ -104,15 +104,15 @@ public function testVerifySolutionSaltSplicing(): void
             algorithm: Algorithm::SHA256,
             maxNumber: 50000,
             number: 123,
-            expires: (new \DateTimeImmutable())->add(new \DateInterval('PT10S')),
+            expires: (new DateTimeImmutable())->add(new DateInterval('PT10S')),
             params: [],
             salt: bin2hex(random_bytes(12)),
         ));
 
         $payload = [
             'algorithm' => $challenge->algorithm,
             'challenge' => $challenge->challenge,
-            'salt' => $challenge->salt . "1",
+            'salt' => $challenge->salt . '1',
             'signature' => $challenge->signature,
             'number' => 23,
         ];