[Draft] .Net Core 3 support: helpers for newly added types/interfaces

[ig-sinicyn]

Will update with things planned for CJ 3.1. Feel free to suggest additions to the list:)

• Add helpers for IAsyncDisposable
• Add support for IAsyncDisposable to AsyncLock.

[NN---]

Do you mean something similar to https://github.com/rsdn/CodeJam/blob/master/CodeJam.Main/Disposable.cs ?

[ig-sinicyn]

Yep. There's a branch for async disposable but the code is incomplete.
The issue meant to be an umbrella for netcore3-related features. But it turns out we are out of ideas:)

[NN---]

Why can't you add what you already have ?

[ig-sinicyn]

The branch is pushed to repo already. I think I will complete it on next weekend.

[NN---]

I mean why it is not in master :)

[ig-sinicyn]

Because the feature is not ready yet and I do not want to add unstable code to the master.

[NN---]

Any update for this?:)