This plugin is deprecated. You should be able to find a new version on npm, probably here.
OneSignal Push Notifications
OneSignal is a high volume Push Notification service for mobile apps. In addition to basic notification delivery, OneSignal also provides tools to localize, target, schedule, A/B test, and automate notifications that you send.
Add the following to your config.xml to use version 1.9.0 of this plugin (recommended)::
You can also omit the version tag to always use the most recent version of this plugin.
Note that this will result in your app being automatically updated with new versions of this plugin as they are released, and may result in unexpected behaviour.