Wish: add support for UnifiedPush

[Integral-Tech]

trafficstars

UnifiedPush is a set of specifications and tools that lets the user choose how push notifications are delivered. All in a free and open source way.

However, only a very limited number of apps support UnifiedPush. (Supported Apps: https://unifiedpush.org/users/apps)

It will be better if NekoX support UnifiedPush.