Null and Bool are reserved phrases in PHP 7

Author: XWB

Resources/doc/usage.md

@@ -183,7 +183,7 @@ The following code will execute a search against the Elasticsearch server:
 
 ```php
 $finder = $this->container->get('fos_elastica.finder.site.article');
-$boolQuery = new \Elastica\Query\Bool();
+$boolQuery = new \Elastica\Query\BoolQuery();
 
 $fieldQuery = new \Elastica\Query\Match();
 $fieldQuery->setFieldQuery('title', 'I am a title string');

Tests/Elastica/ClientTest.php

@@ -3,7 +3,7 @@
 namespace FOS\ElasticaBundle\Tests\Client;
 
 use Elastica\Request;
-use Elastica\Transport\Null as NullTransport;
+use Elastica\Transport\NullTransport;
 
 class ClientTest extends \PHPUnit_Framework_TestCase
 {