No option for ongoing (sticky) notifications

[ghost]

NotificationAPI already implemets support for ongoing notifications: https://github.com/termux/termux-api/blob/master/app/src/main/java/com/termux/api/NotificationAPI.java#L79.

But related option is not present in the wrapper script (termux-notification).

[CanadaHonk]

Just an fyi, in a pull request I did a while ago I slightly broke something in notifications, so I'll add this whilst fixing that hopefully. (Going to make a separate issue for it.)

[xalexalex]

Fixed by #72

[fornwall]

Thanks @xalexalex !