Allow using doctrine/dbal ^3.0 (#38)

Author: mpdude

composer.json

@@ -20,7 +20,7 @@
         "doctrine/annotations": "^1.8",
         "doctrine/cache": "^1.9.1",
         "doctrine/common": "^2.11|^3.0",
-        "doctrine/dbal": "^2.9.3",
+        "doctrine/dbal": "^2.12|^3.0",
         "doctrine/event-manager": "^1.1",
         "doctrine/orm": "^2.7",
         "doctrine/persistence": "^1.3|^2.0"

tests/Webfactory/Doctrine/Config/ExistingConnectionConfigurationTest.php

@@ -45,7 +45,7 @@ public function testWorksWithInfrastructure()
 
         $infrastructure->import(new TestEntity());
 
-        $this->assertEquals(1, $this->connection->fetchColumn('SELECT COUNT(*) FROM test_entity'));
+        $this->assertEquals(1, $this->connection->fetchOne('SELECT COUNT(*) FROM test_entity'));
     }
 
 }