Replace PackageIconUrl with PackageIcon

Author: Numpsy

assets/serilog-enricher-nuget.png

@@ -13,7 +13,7 @@
     <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
     <PackageId>Serilog.Enrichers.Thread</PackageId>
     <PackageTags>serilog;thread;enricher</PackageTags>
-    <PackageIconUrl>http://serilog.net/images/serilog-enricher-nuget.png</PackageIconUrl>
+    <PackageIcon>serilog-enricher-nuget.png</PackageIcon>
     <PackageProjectUrl>http://serilog.net</PackageProjectUrl>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute>
@@ -28,6 +28,13 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Include="..\..\assets\serilog-enricher-nuget.png">
+      <Pack>True</Pack>
+      <PackagePath></PackagePath>
+    </None>
+  </ItemGroup>
+
   <PropertyGroup Condition=" '$(TargetFramework)' == 'net45' ">
     <DefineConstants>$(DefineConstants);THREAD_NAME</DefineConstants>
   </PropertyGroup>