Implement notification channels

[Marc]

When targetting Android O (API level 26) the notifications do not work because the Notification Channels are not implemented.
https://developer.android.com/preview/features/notification-channels.html

[Jeff Gilfelt]

Fixed in 1.1.0

[Tyler Pfaff]

Do you have a snapshot build available anywhere?

[Rodion Surzhenko]

Hi, sorry for disturbing, but how should it work? I updated to version 1.1.0 but still no notifications.