build: add symbols, add source link

Author: phnx47

src/Prometheus.Client.MetricServer/Prometheus.Client.MetricServer.csproj

@@ -3,7 +3,7 @@
     <Description>MetricServer for the Prometheus.Client</Description>
     <Copyright>2020 © Serge K, Oleksandr Poliakov</Copyright>
     <AssemblyTitle>Prometheus.Client.MetricServer</AssemblyTitle>
-    <VersionPrefix>4.0.0</VersionPrefix>
+    <VersionPrefix>4.0.1</VersionPrefix>
     <Authors>Serge K, Oleksandr Poliakov</Authors>
     <TargetFrameworks>netstandard2.0;netcoreapp2.2;netstandard2.1;netcoreapp3.1</TargetFrameworks>
     <LangVersion>latest</LangVersion>
@@ -19,6 +19,9 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>../../Prometheus.Client.MetricServer.snk</AssemblyOriginatorKeyFile>
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
   <ItemGroup>
     <None Include="../../icon.png">
@@ -29,6 +32,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Prometheus.Client" Version="4.1.0" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />