housekeeping: Update to match master at 48fabe2087a21b11d9cdc1a192278…

[glennawatson]

Update the dot net core 3.0 preview (version 8) with latest master.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (preview/8.0-dotnet@2274933). Click here to learn what that means.
The diff coverage is 81.25%.

@@                  Coverage Diff                  @@
##             preview/8.0-dotnet     #339   +/-   ##
=====================================================
  Coverage                      ?   70.69%           
=====================================================
  Files                         ?       65           
  Lines                         ?     3545           
  Branches                      ?      316           
=====================================================
  Hits                          ?     2506           
  Misses                        ?      997           
  Partials                      ?       42

Impacted Files	Coverage Δ
src/Splat.DryIoc/SplatDryIocExtensions.cs	100% <ø> (ø)
...ns.Logging/MicrosoftExtensionsLoggingExtensions.cs	0% <0%> (ø)
...tensions.Logging/MicrosoftExtensionsLogProvider.cs	0% <0%> (ø)
...t.Microsoft.Extensions.Logging/MsLoggingHelpers.cs	100% <100%> (ø)
src/Splat.Autofac/SplatAutofacExtensions.cs	100% <100%> (ø)
src/Splat/TargetFrameworkExtensions.cs	93.54% <100%> (ø)
src/Splat.DryIoc/DryIocDependencyResolver.cs	56.25% <100%> (ø)
src/Splat/Logging/WrappingLogLevelLogger.cs	100% <100%> (ø)
src/Splat.Autofac/AutofacDependencyResolver.cs	42.42% <62.5%> (ø)
...nsions.Logging/MicrosoftExtensionsLoggingLogger.cs	84.21% <80%> (ø)
... and 1 more

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