Build failure because of outdated Proton OSS repositories

[Popax21]

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The C# SDK currently fails to build because the Proton.Cryptography dependency is too old.
Proton has open sourced this dependency here, however said repository was last updated 11 months ago, and as such is missing various pieces of functionality required by the SDK (most notably various AEAD components).

I am aware that the SDK is not yet ready for third-party production use.
However, it would be much appreciated if said repository / any other Proton OSS dependencies could be updated regardless to ensure that the community may experiment with the SDK already as outlined in the respective announcement blog posts.

[Gronex]

It would be nice with a pre release version on nuget as well, like the js sdk