Include the readme file in the nuget package

Author: Numpsy

src/Serilog.Sinks.Debug/Serilog.Sinks.Debug.csproj

@@ -19,8 +19,7 @@
     <PackageProjectUrl>https://github.com/serilog/serilog-sinks-debug</PackageProjectUrl>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageIcon>icon.png</PackageIcon>
-    <RepositoryUrl>https://github.com/serilog/serilog-sinks-debug</RepositoryUrl>
-    <RepositoryType>git</RepositoryType>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
     <RootNamespace>Serilog</RootNamespace>
@@ -37,6 +36,7 @@
 
   <ItemGroup>
     <None Include="..\..\assets\icon.png" Pack="true" Visible="false" PackagePath="" />
+    <None Include="../../README.md" Pack="true" Visible="false" PackagePath="/" />
   </ItemGroup>
 
 </Project>