First set of upgrade to 5.3 stuff.

app/Providers/BroadcastServiceProvider.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace FireflyIII\Providers;
+
+use Illuminate\Support\ServiceProvider;
+use Illuminate\Support\Facades\Broadcast;
+
+class BroadcastServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap any application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        Broadcast::routes();
+
+        /*
+         * Authenticate the user's personal channel...
+         */
+        Broadcast::channel('App.User.*', function ($user, $userId) {
+            return (int) $user->id === (int) $userId;
+        });
+    }
+}