v2.3.0

What's new?

• micro-optimization:
  • using throw helper instead of throwing exceptions directly (to please JITter)
  • passing emitter by state when registering HttpResponse.OnStarting callback, avoiding capture/function allocation

Fixes

• throwing ArgumentNullException when configuring correlator using correlatorBuilder.WithValidator(...) and passing null validator

Other changes

Unrelated to binary distribution:

• dropping netcoreapp3.1 sample app
• update BenchmarkDotNet