updated new flutter version

lib/widgets/desktop/desktop_change_password.dart

@@ -280,8 +280,10 @@ class DesktopChangePasswordState extends State<DesktopChangePassword> {
                           padding: EdgeInsets.only(right: 16.0, top: 16.0),
                           child: Align(
                             alignment: Alignment.centerRight,
-                            child: RaisedButton(
-                              color: Theme.of(context).primaryColor,
+                            child: ElevatedButton(
+                              style: ElevatedButton.styleFrom(
+                                primary: Theme.of(context).primaryColor,
+                              ),
                               child: Text(
                                 S.of(context).submit,
                                 style: TextStyle(
@@ -319,7 +321,7 @@ class DesktopChangePasswordState extends State<DesktopChangePassword> {
               title: Text(S.of(context).success),
               content: Text(S.of(context).password_has_been_changed),
               actions: <Widget>[
-                FlatButton(
+                TextButton(
                   child: Text(S.of(context).ok),
                   onPressed: () {
                     Navigator.of(context).pop();