[add] README to package

Author: i4004

src/Simplify.Web.Multipart/Simplify.Web.Multipart.csproj

@@ -16,6 +16,7 @@
 		<PackageProjectUrl>https://github.com/SimplifyNet/Simplify.Web.Multipart</PackageProjectUrl>
 		<RepositoryUrl>https://github.com/SimplifyNet/Simplify.Web.Multipart</RepositoryUrl>
 		<RepositoryType>GIT</RepositoryType>
+		<PackageReadmeFile>README.md</PackageReadmeFile>
 		<PackageTags>Simplify.Web multipart</PackageTags>
 
 		<PackageIcon>icon.png</PackageIcon>
@@ -31,5 +32,6 @@
 		<None Include="..\..\images\icon.png" Pack="true" Visible="false" PackagePath="" />
 		<None Include="..\..\LICENSE.txt" Pack="true" PackagePath="\" />
 		<None Include="CHANGELOG.md" Pack="true" PackagePath="\" />
+		<None Include="..\..\README.md" Pack="true" PackagePath="\" />
 	</ItemGroup>
 </Project>