dev_compiler: drop usage of pkg:js

[kevmoo]

Use dart:js_interop instead

sdk/pkg/dev_compiler/web/stack_trace_mapper.dart

Line 24 in ed32d24

import 'package:js/js.dart';

[dart-github-bot]

Summary: The dev_compiler package uses the deprecated pkg:js package. The issue suggests migrating to the newer dart:js_interop instead.