Proposal to drop .NETFramework 4.6 target

[iamcarbon]

.NET Framework 4.6 is reaching end of life in April of 2022 and most users should have already updated (or received an automatic update) to at least net462 (covered by the net461 target).

Is it a good time to drop this target to simplify our build?

[FlorianRappl]

Hm, how much would we gain here?

For background: Dropping the .NET Standard 1.3 was "easy" in that regard; apparently not many users (if any) + lots of code that had to be modified just to have it working (which then also impacted the other frameworks...).

In a year the situation will look more clear, right now for me the question is - are there parts in the code that could be done better if we drop 4.6?

[FlorianRappl]

Dropped for 0.17.0 / 1.0

Landed in devel