Missing unsubscribe

https://github.com/JoeyMckenzie/BlazorConduit/blob/master/source/BlazorConduit.Client/Pages/Article/Article.razor#L79

This is a standard .NET event. If you don't remove your subscription then the store will keep a reference to your component instance and it will never be garbage collected, resulting in a memory leak.

Personally I wouldn't subscribe to the event. It's really only meant for people who can't descend from `FluxorComponent` (which you have).

I would change IsFollowing to a property:

```
private bool IsFollowing =>
state.IsFollowingUser
?? state.CurrentArticle?.Author?.Following
?? false;
```