[FEATURE]Update doctrine/orm to 2.6 (#311)

* Update doctrine/orm to 2.6

* Fix failing test

Author: sztyup

composer.json

@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": ">=7.0",
-        "doctrine/orm": "2.5.*",
+        "doctrine/orm": "2.5.*|2.6.*",
         "illuminate/auth": "5.5.*|5.6.*",
         "illuminate/console": "5.5.*|5.6.*",
         "illuminate/container": "5.5.*|5.6.*",

tests/Pagination/PaginatorAdapterTest.php

@@ -88,6 +88,7 @@ private function mockEntityManager()
 
         $connection->shouldReceive('getDatabasePlatform')->andReturn($platform);
         $connection->shouldReceive('executeQuery')->andReturn([]);
+        $connection->shouldReceive('getParams')->andReturn([]);
 
         $platform->shouldReceive('appendLockHint')->andReturnUsing(function ($a) {
             return $a;