Upgrade to xUnit 2.8.1 (#1876)

Directory.Packages.props

@@ -25,7 +25,7 @@
     <PackageVersion Include="Spectre.Console.Cli" Version="0.45.0" />
     <PackageVersion Include="System.Text.Json" Version="8.0.3" />
     <PackageVersion Include="Test262Harness" Version="1.0.0" />
-    <PackageVersion Include="xunit" Version="2.8.0" />
+    <PackageVersion Include="xunit" Version="2.8.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.1" PrivateAssets="all" />
     <PackageVersion Include="YantraJS.Core" Version="1.2.209" />
   </ItemGroup>

Jint.Tests/Runtime/StringTests.cs

@@ -90,7 +90,7 @@ bar += 'bar';
         Assert.Equal(-1, engine.Evaluate("'王五'.localeCompare('张三', 'zh-CN')").AsInteger());
     }
 
-    public static TheoryData GetLithuaniaTestsData()
+    public static TheoryData<string, string> GetLithuaniaTestsData()
     {
         return new StringTetsLithuaniaData().TestData();
     }