Compatibility with Laravel 5.5. (#27)

* Update UpdateCommand.php

Compatibility with Laravel 5.5.

* Update UpdateCommand.php

remove spaces.

src/Console/UpdateCommand.php

@@ -41,7 +41,7 @@ public function __construct(array $config)
     /**
      * Execute the console command.
      */
-    public function fire()
+    public function handle()
     {
         $result = $this->geoIPUpdater->update();
 
@@ -53,4 +53,12 @@ public function fire()
 
         $this->info('New update file ('.$result.') installed.');
     }
+
+    /**
+     * Compatibility with old versions of Laravel.
+     */
+    public function fire()
+    {
+        $this->handle();
+    }
 }