Fix TU for symfony 6.3

  1x: Method "Symfony\Component\Security\Core\User\UserInterface::eraseCredentials()" might add "void" as a native return type declaration in the future. Do the same in implementation "Lexik\Bundle\JWTAuthenticationBundle\Security\User\JWTUser" now to avoid errors or add an explicit @return annotation to suppress this message.
    1x in BlocklistTokenTest::testShouldInvalidateTokenOnLogoutWhenBlockListTokenIsEnabled from Lexik\Bundle\JWTAuthenticationBundle\Tests\Functional

  1x: Method "Symfony\Component\Security\Core\User\UserInterface::eraseCredentials()" might add "void" as a native return type declaration in the future. Do the same in implementation "Lexik\Bundle\JWTAuthenticationBundle\Tests\Stubs\User" now to avoid errors or add an explicit @return annotation to suppress this message.
    1x in JWTAuthenticatorTest::testAuthenticate from Lexik\Bundle\JWTAuthenticationBundle\Tests\Security\Authenticator

Security/User/JWTUser.php

@@ -71,6 +71,8 @@ public function getSalt(): ?string
 
     /**
      * {@inheritdoc}
+     *
+     * @return void
      */
     public function eraseCredentials()
     {

Tests/Stubs/User.php

@@ -79,7 +79,7 @@ public function getUserIdentifier(): string
     /**
      * {@inheritdoc}
      */
-    public function eraseCredentials()
+    public function eraseCredentials(): void
     {
     }