Update to modal_bottom_sheet: ^1.0.1-dev

lib/country_code_picker.dart

@@ -245,7 +245,7 @@ class CountryCodePickerState extends State<CountryCodePicker> {
       barrierColor: widget.barrierColor ?? Colors.grey.withOpacity(0.5),
       backgroundColor: widget.backgroundColor ?? Colors.transparent,
       context: context,
-      builder: (context, scrollController) => SelectionDialog(
+      builder: (context) => SelectionDialog(
         elements,
         favoriteElements,
         showCountryOnly: widget.showCountryOnly,