Merge pull request #60 from Philipp91/collapse-priority

Merge pull request #59 from Philipp91/simplify

Merge branch 'master' into simplify

Altered xdebug command to use for windows locally and added a description.

Merge pull request #66 from EdwinHoksberg/rayansys-patch-1

Merged in android_channel_id pull request from rayansys

Update Notification.php

Merge pull request #63 from bdaler/add-image-url-to-notification

add ability to attach image to push notification according official doc: https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages?hl=ru#Notification

Add Push::setPriority()

Add Push::setCollapseKey()

Turn Push into a super-class instead of a trait

Declare dependency on JSON PHP extension

Simplify array_reduce() to implode(array_map())

Replace current() with [0] to access the first array element