Merge pull request #67 from GameplayJDK/1.x-change_config_visibility_…

…default

Change the default visibility to 'public' in config

src/DependencyInjection/Configuration.php

@@ -40,7 +40,7 @@ public function getConfigTreeBuilder()
  ->end()
  ->defaultValue([])
  ->end()
- ->scalarNode('visibility')->defaultNull()->end()
+ ->scalarNode('visibility')->defaultValue('public')->end()
  ->booleanNode('case_sensitive')->defaultTrue()->end()
  ->booleanNode('disable_asserts')->defaultFalse()->end()
  ->end()