Fix types consistency in database config (laravel#5191)

Author: antonkomarev

config/database.php

@@ -130,16 +130,16 @@
             'url' => env('REDIS_URL'),
             'host' => env('REDIS_HOST', '127.0.0.1'),
             'password' => env('REDIS_PASSWORD', null),
-            'port' => env('REDIS_PORT', 6379),
-            'database' => env('REDIS_DB', 0),
+            'port' => env('REDIS_PORT', '6379'),
+            'database' => env('REDIS_DB', '0'),
         ],
 
         'cache' => [
             'url' => env('REDIS_URL'),
             'host' => env('REDIS_HOST', '127.0.0.1'),
             'password' => env('REDIS_PASSWORD', null),
-            'port' => env('REDIS_PORT', 6379),
-            'database' => env('REDIS_CACHE_DB', 1),
+            'port' => env('REDIS_PORT', '6379'),
+            'database' => env('REDIS_CACHE_DB', '1'),
         ],
 
     ],