build: upgrade to latest anglesharp, build dependencies

Author: egil

src/AngleSharp.Diffing/AngleSharp.Diffing.csproj

@@ -27,13 +27,9 @@
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
   </ItemGroup>
 
-  <PropertyGroup>
-    <AnnotatedReferenceAssemblyVersion>3.0.0</AnnotatedReferenceAssemblyVersion>
-  </PropertyGroup>
-
   <ItemGroup>
-    <PackageReference Include="TunnelVisionLabs.ReferenceAssemblyAnnotator" Version="1.0.0-alpha.77" PrivateAssets="all" />
-    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[$(AnnotatedReferenceAssemblyVersion)]" />
+    <PackageReference Include="TunnelVisionLabs.ReferenceAssemblyAnnotator" Version="1.0.0-alpha.160" PrivateAssets="all" />
+    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[5.0.0]" />
   </ItemGroup>
 
   <ItemGroup>

src/Directory.Build.props

@@ -12,7 +12,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AngleSharp" Version="0.14.0" />
-    <PackageReference Include="AngleSharp.Css" Version="0.14.0" />
+    <PackageReference Include="AngleSharp" Version="0.15.0" />
+    <PackageReference Include="AngleSharp.Css" Version="0.14.2" />
   </ItemGroup>
 </Project>