Update for 0.12.2

[sharwell]

We're at a place in dotnet/roslyn where it's not easy to avoid the use of LangVersion=preview. Would it be possible to push a 0.12.2 update to NuGet so we have easy access to #1420 without needing to modify the project locally every time we want to run benchmarks?

[En3Tho]

@adamsitnik @AndreyAkinshin Is there any progress on this? At least make a 0.12.1.1 or whatever. It's such a pain to try new features in defferent repos

[robertcoltheart]

Agreed, can we get some traction on this please?

[AndreyAkinshin]

@sharwell, @En3Tho, @robertcoltheart BenchmarkDotNet v0.13.0 with all the fixed is published on nuget.org. Sorry for the delay.

[En3Tho]

@AndreyAkinshin Thanks!