fix(web): use if (dart.library.html) instead of if (dart.html)

flutter/example/integration_test/web_sdk_test.dart

@@ -111,9 +111,10 @@ void main() {
             'sentry.dart.flutter');
 
         final item = (envelope[1] as List<Object?>).first as List<Object?>;
-        final itemPayload =
-            json.decode(utf8.decoder.convert((item[1] as List<int>)))
-                as Map<Object?, Object?>;
+        final itemPayloadJs = (item[1] as JSArray).toDart;
+        final itemPayload = json.decode(utf8.decoder.convert(itemPayloadJs
+            .map((el) => int.parse(el.dartify().toString()))
+            .toList())) as Map<Object?, Object?>;
 
         final jsEventJson = (itemPayload).map((key, value) {
           return MapEntry(key.toString(), value as dynamic);

flutter/lib/src/web/html_sentry_js_binding.dart

@@ -1,3 +1,5 @@
+// Will be removed in v9
+// ignore: deprecated_member_use
 import 'dart:js';
 
 import 'package:flutter/cupertino.dart';
@@ -56,7 +58,8 @@ class HtmlSentryJsBinding implements SentryJsBinding {
   @visibleForTesting
   @override
   getJsOptions() {
-    final sentry = context['Sentry'] as JsObject;
-    return sentry.callMethod('getClient').callMethod('getOptions').dartify();
+    // newest flutter version removed dartify from JsObject
+    // we will remove this file in v9 anyway
+    return null;
   }
 }

flutter/lib/src/web/sentry_js_binding.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/cupertino.dart';
 
 export 'noop_sentry_js_binding.dart'
-    if (dart.html) 'html_sentry_js_binding.dart'
+    if (dart.library.html) 'html_sentry_js_binding.dart'
     if (dart.library.js_interop) 'web_sentry_js_binding.dart';
 
 abstract class SentryJsBinding {