Allow redirect without id_token_hint

[JimPanse2k19]

I think, the last changes in this implementation

oauth2-keycloak/src/Provider/Keycloak.php

Lines 160 to 169 in 34e4824

	if ($this->validateGteVersion('18.0.0')) {
	if (isset($options['access_token']) === true) {
	$accessToken = $options['access_token'];
	$params['id_token_hint'] = $accessToken->getValues()['id_token'];
	$params['post_logout_redirect_uri'] = $params['redirect_uri'];
	}
	unset($params['redirect_uri']);
	}

does not represent the current specs on https://openid.net/specs/openid-connect-rpinitiated-1_0.html where it says, that a id_token parameter is recommended but not mandatory. This current implementation does not allow to have the redirect without a token anymore, which is wrong. The line $params['post_logout_redirect_uri'] = $params['redirect_uri']; should be outside the if statement.