misc: reorder PackageReference for Xunit.SkippableFact in unit tests project

Author: DennisDyallo

Yubico.Core/tests/Yubico.Core.UnitTests.csproj

@@ -43,8 +43,8 @@ limitations under the License. -->
     <DefineConstants>Linux</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Xunit.SkippableFact" Version="1.4.13" />
     <ProjectReference Include="..\src\Yubico.Core.csproj" />
+    <PackageReference Include="Xunit.SkippableFact" Version="1.4.13" />
     <PackageReference Include="coverlet.collector" Version="6.0.2" PrivateAssets="all" IncludeAssets="runtime; build; native; contentfiles; analyzers; buildtransitive" />
     <PackageReference Include="xunit" Version="2.8.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1" PrivateAssets="all" IncludeAssets="runtime; build; native; contentfiles; analyzers; buildtransitive" />
@@ -55,5 +55,5 @@ limitations under the License. -->
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
-  
+
 </Project>