Custom icon isn't shown parallel to the text + notification height is bigger

[Plazzmex]

Hey,

I don't know if you're still working on this and/or if there will be future releases.
I love this library, it's very efficient and easy to use!!!

Though, there's a bug when using a custom icon, the icon is shown a little bit higher than the text and the notification height is bigger than the standard notifications.

See picture