Fixed example and deprecated form_build_typeahead parameter

Author: troya2

example/lib/main.dart

@@ -59,7 +59,7 @@ class MyHomePageState extends State<MyHomePage> {
                 FormBuilderSearchableDropdown<String>(
                   name: 'searchable_dropdown_online',
                   onChanged: _onChanged,
-                  asyncItems: (filter) async {
+                  asyncItems: (filter, _) async {
                     await Future.delayed(const Duration(seconds: 1));
                     return allCountries
                         .where((element) => element

lib/src/fields/form_builder_typeahead.dart

@@ -287,7 +287,7 @@ extension TextFiledCopy on TextField {
       onAppPrivateCommand: onAppPrivateCommand,
       onTapAlwaysCalled: onTapAlwaysCalled,
       onTapOutside: onTapOutside,
-      scribbleEnabled: scribbleEnabled,
+      stylusHandwritingEnabled: stylusHandwritingEnabled,
       spellCheckConfiguration: spellCheckConfiguration,
       statesController: statesController,
       strutStyle: strutStyle,