Ensure that the git repository is published

We could hard-code this, but SourceLink can instead automatically generate the reference. This is needed for SourceLink to provide a reference to the exact code referenced by the symbols package.

Author: JeremyCaney

Directory.Build.props

@@ -17,6 +17,7 @@
     <NeutralLanguage>en</NeutralLanguage>
     <IncludeSymbols>true</IncludeSymbols>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageIcon>Icon.png</PackageIcon>
   </PropertyGroup>