Adding SourceLink properties and NuGet package (#538)

Author: tmilnthorp

UnitsNet/UnitsNet.Common.props

@@ -23,11 +23,17 @@
     <TargetFrameworks>netstandard2.0;net40</TargetFrameworks>
     <RootNamespace>UnitsNet</RootNamespace>
     <NoWarn>CS1701;CS1702;CS1705;CS0618;CS0809;CS1591</NoWarn>
+
+    <!-- SourceLink -->
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
   </PropertyGroup>
 
   <!-- NuGet references that work for both signed and unsigned -->
   <ItemGroup>
     <PackageReference Include="JetBrains.Annotations" Version="10.4.0" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta-63127-02" PrivateAssets="All"/>
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>