authYubiKey: Fix use of &new, which isn't correct for PHP5.
authYubiKey: Fix use of &new, which isn't correct for PHP5.

Thanks to Patrick Honing for reporting this bug.

newmen/saml2,ArtemTeleshev/php-saml2,cb8/saml2,sitya/saml2,sgomez/saml2,simplesamlphp/saml2,madmatt/saml2