Updated flutter and dependencies

lib/view/pages/more/holidays/holidays.dart

@@ -1,5 +1,6 @@
+import 'dart:core';
+
 import 'package:flutter/material.dart';
-import 'package:flutter_native_splash/cli_commands.dart';
 import 'package:jiffy/jiffy.dart';
 import 'package:provider/provider.dart';
 
@@ -20,6 +21,12 @@ class Holidays extends StatefulWidget {
   State<Holidays> createState() => _HolidaysState();
 }
 
+extension StringExtension on String {
+  String capitalize() {
+    return "${this[0].toUpperCase()}${substring(1).toLowerCase()}";
+  }
+}
+
 class _HolidaysState extends State<Holidays> {
   late SettingsProvider settings = Provider.of<SettingsProvider>(context, listen: false);
   late bool showPastEvents = settings.val().holidaysSettings.showPastEvents;