add a type annotation to defineOptions()
diff --git a/lib/src/cli/options.dart b/lib/src/cli/options.dart
index b018cde..30ebcc8 100644
--- a/lib/src/cli/options.dart
+++ b/lib/src/cli/options.dart
@@ -5,7 +5,8 @@
import '../style_fix.dart';
-void defineOptions(ArgParser parser, {bool oldCli = false, verbose = false}) {
+void defineOptions(ArgParser parser,
+ {bool oldCli = false, bool verbose = false}) {
if (oldCli) {
// The Command class implicitly adds "--help", so we only need to manually
// add it for the old CLI.
