update notification

composer.json

@@ -5,7 +5,7 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": "^7.2",
+        "php": "^7.4",
         "barryvdh/laravel-dompdf": "^0.8.4",
         "barryvdh/laravel-ide-helper": "2.7.0",
         "davejamesmiller/laravel-breadcrumbs": "5.3.2",
@@ -19,7 +19,8 @@
         "laravel/ui": "^2.0",
         "nao-pon/flysystem-google-drive": "^1.1",
         "nexmo/client": "^2.0",
-        "pragmarx/version": "^1.2"
+        "pragmarx/version": "^1.2",
+        "pusher/pusher-php-server": "~4.0"
     },
     "require-dev": {
         "filp/whoops": "^2.0",