add enterprise option to the Fixer provider

Author: anorgan

DependencyInjection/Configuration.php

@@ -68,6 +68,7 @@ public function getConfigTreeBuilder()
                                     ->isRequired()
                                     ->cannotBeEmpty()
                                 ->end()
+                                ->booleanNode('enterprise')->defaultFalse()->end()
                             ->end()
                         ->end()
                         ->append($this->createSimpleProviderNode('cryptonator'))