Enable Starlark proto_library by default
Downstream tests show no new failures.
@@ -39,7 +39,7 @@ exported_rules = {
"-java_lite_proto_library": java_lite_proto_library,
"objc_import": objc_import,
"objc_library": objc_library,
- "-proto_library": proto_library,
+ "+proto_library": proto_library,
"+apple_static_library": apple_static_library,
"+cc_shared_library": cc_shared_library,
"+cc_shared_library_permissions": cc_shared_library_permissions,
