fixed dependency injection

[guycalledseven]

Q	A
Bug fix?	yes
New feature?	no
BC breaks?	yes
Deprecations?	yes
Related tickets	#1
License	MIT

This should fix error:

[2020-10-06 15:07:48] php.CRITICAL: Argument 1 passed to Payum\Core\Gateway::addAction() must implement interface Payum\Core\Action\ActionInterface, string given, called in /var/www/vendor/payum/payum/src/Payum/Core/CoreGatewayFactory.php on line 219 {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Argument 1 passed to Payum\\Core\\Gateway::addAction() must implement interface Payum\\Core\\Action\\ActionInterface, string given, called in /var/www/vendor/payum/payum/src/Payum/Core/CoreGatewayFactory.php on line 219 at /var/www/vendor/payum/payum/src/Payum/Core/Gateway.php:66)"} []

Not sure if this is proper way to fix this issue. Please check.