Update Benchmark to .NET 8.0.

Author: bgrainger

tests/Benchmark/Benchmark.csproj

@@ -1,13 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0</TargetFramework>
-    <LangVersion>11.0</LangVersion>
+    <TargetFramework>net8.0</TargetFramework>
+    <LangVersion>12.0</LangVersion>
+    <ManagePackageVersionsCentrally>false</ManagePackageVersionsCentrally>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.2" />
-    <PackageReference Include="MySqlConnector" Version="2.2.6" />
-    <PackageReference Include="MySql.Data" Version="8.0.32" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.10" />
+    <PackageReference Include="MySqlConnector" Version="2.3.1" />
+    <PackageReference Include="MySql.Data" Version="8.2.0" />
   </ItemGroup>
 
 <!--  <ItemGroup>-->

tests/Benchmark/Program.cs

@@ -23,7 +23,7 @@ static void Main()
 			.AddValidator(JitOptimizationsValidator.FailOnError)
 			.AddDiagnoser(MemoryDiagnoser.Default)
 			.AddColumn(StatisticColumn.AllStatistics)
-			.AddJob(Job.Default.WithRuntime(CoreRuntime.Core70))
+			.AddJob(Job.Default.WithRuntime(CoreRuntime.Core80))
 			.AddExporter(DefaultExporters.Csv);
 
 		var summary = BenchmarkRunner.Run<MySqlClient>(customConfig);