Add Symbols and SourceLink (#4)

Author: ElanHasson

src/Directory.Build.props

@@ -6,4 +6,9 @@
 			<_Parameter1>$(AssemblyName).Tests</_Parameter1>
 		</AssemblyAttribute>
 	</ItemGroup>
+	<PropertyGroup>
+		<!-- Include symbol files (*.pdb) in the built .nupkg -->
+		<AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
+		<PublishRepositoryUrl>true</PublishRepositoryUrl>
+  	</PropertyGroup>
 </Project>