Fix SourceLink and IntelliSense on doc-comments in Annotations

Author: bkoelman

src/JsonApiDotNetCore.Annotations/JsonApiDotNetCore.Annotations.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>$(TargetFrameworkName);netstandard1.0</TargetFrameworks>
     <IsPackable>true</IsPackable>
@@ -45,4 +45,9 @@
     <Compile Remove="**/*.netstandard.cs" />
     <None Include="**/*.netstandard.cs" />
   </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
+    <PackageReference Include="SauceControl.InheritDoc" Version="1.3.0" PrivateAssets="All" />
+  </ItemGroup>
 </Project>