Invalid psr-0 entry in composer.json

[rquadling]

As this package does not include the scpService library, indicating the location in this package would seem to be incorrect.
https://github.com/digitickets/omnipay-digitickets-voucher/blob/master/composer.json#L24

As a consequence, composer will attempt to locate the scpService in an invalid directory, as shown in this snippet of a dump of the autoloader instance ...

    [prefixesPsr0:Composer\Autoload\ClassLoader:private] => Array
        (
            [s] => Array
                (
                    [scpService] => Array
                        (
                            [0] => /var/www/app/vendor/composer/../digitickets/omnipay-digitickets-voucher/lib
                            [1] => /var/www/app/vendor/composer/../digitickets/omnipay-pay360/lib
                        )

                )

Entry [0] does not exist.

The required package already correctly identifies the location of the service.