feat: enable Source Linking (#166)

Author: hymccord

Directory.Build.props

@@ -7,6 +7,8 @@
     <RepositoryUrl>$(PackageProjectUrl)</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
 
     <!-- Build Options -->
     <DisableImplicitNuGetFallbackFolder>true</DisableImplicitNuGetFallbackFolder>

src/Nogic.WritableOptions/Nogic.WritableOptions.csproj

@@ -14,6 +14,10 @@
     <None Include="../../README.md" Pack="true" PackagePath="/" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="all" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(TargetFramework)'!='netstandard2.0'">
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.0" />