Add support for Web Assembly (WASM) in clevertap_plugin_web

[ritikjainx]

Flutter web build with --wasm fails due to use of 'package:js/js.dart'
Issue in these files.

../../../../.pub-cache/hosted/pub.dev/clevertap_plugin-2.5.0/lib/src/clevertap_plugin_web_binding.dart:4:1: Error: JS interop library 'package:js/js.dart'
can't be imported when compiling to Wasm.
Try using 'dart:js_interop' or 'dart:js_interop_unsafe' instead.
import 'package:js/js.dart';
^
../../../../.pub-cache/hosted/pub.dev/clevertap_plugin-2.5.0/lib/clevertap_plugin_web.dart:7:1: Error: JS interop library 'package:js/js_util.dart' can't be
imported when compiling to Wasm.
Try using 'dart:js_interop' or 'dart:js_interop_unsafe' instead.
import 'package:js/js_util.dart' as js_util;
^
../../../../.pub-cache/hosted/pub.dev/clevertap_plugin-2.5.0/lib/clevertap_plugin_web.dart:8:1: Error: JS interop library 'package:js/js.dart' can't be
imported when compiling to Wasm.
Try using 'dart:js_interop' or 'dart:js_interop_unsafe' instead.
import 'package:js/js.dart';

Steps to reproduce:

1. Make a Flutter web project.
2. Include Clevertap plugin in pubspec.yaml. - flutter pub add clevertap_plugin
3. run Flutter build web --wasm

Ref: https://docs.flutter.dev/platform-integration/web/wasm#:~:text=own%20browser%20engine.-,Using%20compatible%20JS%20interop%20libraries,%23,-To%20support%20compilation

[anaghvj]

any updates on this?