upgrade packages

lib/pages/faq/faq_edit_page.dart

@@ -92,10 +92,10 @@ class _FAQEditorState extends State<FAQEditor> {
         color: primaryColor,
       ),
       onChanged: (String? newValue) {
-        if(newValue != null)
-        setState(() {
-          _pageLink = newValue;
-        });
+        if (newValue != null)
+          setState(() {
+            _pageLink = newValue;
+          });
       },
       items: <String>[
         info,
@@ -197,10 +197,7 @@ class _FAQEditorState extends State<FAQEditor> {
       _isLoading = true;
     });
     try {
-      int sn = int.parse(
-        _sn.text,
-        onError: (source) => throw Exception("Invalid number"),
-      );
+      int sn = int.parse(_sn.text);
       FAQModel faqModel = Provider.of<FAQModel>(context, listen: false);
       FAQ _faq = FAQ(
           sn: sn,