Merge pull request #70 from bdovaz/dev

Bump Serilog version dependency to support Unity and .netstandard 2.0+

Author: nblumhardt

src/Serilog.Sinks.Async/Serilog.Sinks.Async.csproj

@@ -29,7 +29,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Serilog" Version="2.8.0" />
+    <PackageReference Include="Serilog" Version="2.9.0" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' Or '$(TargetFramework)' == 'net461' ">