Allow translation of keys with dashes

Author: MisatoTremor

DependencyInjection/Configuration.php

@@ -120,6 +120,7 @@ public function addKeysConfig($key, $default = [])
             ->prototype('scalar')
                 ->isRequired()
             ->end()
+            ->normalizeKeys(false)
             ->defaultValue($default);
 
         return $node;