[infra_ui][keyboard] Bump infra_ui to 1.20.0 and fix compiling issues

app_flowy/packages/flowy_infra_ui/example/lib/home/home_screen.dart

@@ -1,5 +1,5 @@
-import 'package:example/keyboard/keyboard_screen.dart';
 import 'package:flutter/material.dart';
+import '../keyboard/keyboard_screen.dart';
 import 'demo_item.dart';
 
 class HomeScreen extends StatelessWidget {

app_flowy/packages/flowy_infra_ui/example/lib/main.dart

@@ -1,5 +1,5 @@
-import 'package:example/home/home_screen.dart';
 import 'package:flutter/material.dart';
+import '../home/home_screen.dart';
 
 void main() {
   runApp(const ExampleApp());

app_flowy/packages/flowy_infra_ui/example/test/widget_test.dart

@@ -18,8 +18,12 @@ void main() {
     // Verify that platform version is retrieved.
     expect(
       find.byWidgetPredicate(
+<<<<<<< HEAD
         (Widget widget) =>
             widget is Text && widget.data!.startsWith('Running on:'),
+=======
+        (Widget widget) => widget is Text && widget.data!.startsWith('Running on:'),
+>>>>>>> [infra_ui][keyboard] Bump infra_ui to 1.20.0 and fix compiling issues
       ),
       findsOneWidget,
     );

app_flowy/packages/flowy_infra_ui/lib/src/overlay/overlay_widget.dart

@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
 
 class Overlay extends StatelessWidget {
-  const Overlay({Key? key}) : super(key: key);
+  const Overlay({
+    Key? key,
+    this.safeAreaEnabled = true,
+  }) : super(key: key);
 
   final bool safeAreaEnabled;