[browser] Uncaught Error: System.Delegate.DynamicInvoke method can not be resolved.

When building an app using `<PublishTrimmed>true</PublishTrimmed>` the linker is linking out `System.Delegate.DynamicInvoke`

```
Uncaught Error: System.Delegate.DynamicInvoke method can not be resolved.
    at Object.invoke_delegate (dotnet.js:9519)
    at WebSocket.<anonymous> (dotnet.js:8531)
```