Fix provider resolution

Author: plokko

src/ReadonlyDatabase.php

@@ -1,14 +1,13 @@
 <?php
 namespace Plokko\LaravelFirebase;
 
-use Plokko\Firebase\IO\Database;
 use Plokko\Firebase\IO\Reference;
 
 /**
  * Wrapper of Plokko\Firebase\IO\Database that disabes write operations
  * @package Plokko\LaravelFirebase
  */
-class ReadonlyDatabase extends Database
+class ReadonlyDatabase extends RealtimeDb
 {
 
     // Disable write functions
@@ -20,4 +19,4 @@ function getReference($path)
     {
         return new Reference($this,$path);
     }
-}
+}

src/ServiceProvider.php

@@ -37,13 +37,14 @@ public function register()
         });
 
         // Provide Firebase Database
-        $this->app->singleton(Database::class, function ($app, array $opt = []) {
+        $this->app->singleton(Database::class, RealtimeDb::class);
+        $this->app->singleton(RealtimeDb::class, function ($app, array $opt = []) {
             $dbName = $opt['db'] ?? config('laravel-firebase.default_db');
             $dbUrl = config('laravel-firebase.firebasedb_urls.' . $dbName);
 
             return (config('laravel-firebase.read_only')) ?
                 new ReadonlyDatabase($app->make(ServiceAccount::class), $dbUrl) :
-                new Database($app->make(ServiceAccount::class), $dbUrl);
+                new RealtimeDb($app->make(ServiceAccount::class), $dbUrl);
         });
 
         $this->app->bind(FcmMessageBuilder::class, function ($app) {