Minor nits from perusing the source; most are likely breaking changes best kept for v4

• TFMs
  • maybe a note somewhere about having a net6.0 TFM but explaining that no egregious later ones will be added see (see reasoning in Add net6.0 Target serilog-sinks-console#145 (comment))
  • remove net5.0 TFM (see above)
  • remove net7.0 TFM (atm it has identical DefineConstants values to net6.0)
  • Remove netcoreapp3.1, net5.0 from tests
• README

  • Is there a stance/policy on copyright years (atm readme has 2020)

  • var log = new LoggerConfiguration() should gain a using

  • Log.CloseAndFlush(); in static example

    • should probably gain a // Normally in a try/finally; ensures File, Async etc sinks have been flushed before program exits`
    • or, more tersely '// ensure buffering or async Sinks are flushed before app exits'

  • move gitter mention further down the list? or remove?

  • We welcome bug reports and suggestions through our

    We welcome reproducable bug reports and detailed feature requests through our issue tracker here on GitHub; please note the other avenues are much better or for quick questions or seeking usage help

• 🤔 remove changes.md given it stops dead at 2.10 (or sync with GH release notes)
• AssemblyVersion [for 3.x] is 2.0, maybe shift to 4.0 in v4?
• on https://github.com/serilog/serilog/wiki/Getting-Started, in the sample app
  • maybe lose and Windows Phone 8+. (maybe add some Blazor mention?)
  • use a top level namespace SerilogExample
  • consider using await Log.CloseAndFlushAsync()
  • (if this makes sense, ping me and I can do the edits)
• 914M on https://www.nuget.org/packages/Serilog/ is insane (currently # 8 all time, should be 7 soon) - not long to go to 1B!

(Happy to do PRs for any that get agreed; equally happy for someone else to do them...)