Update to support latest dotnet

Author: laurynas

DetectLanguage.Tests/DetectLanguage.Tests.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="nunit" Version="3.11.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.11.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="nunit" Version="3.14.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
   </ItemGroup>
 
   <ItemGroup>

DetectLanguage/DetectLanguage.csproj

@@ -12,12 +12,12 @@
     <RepositoryUrl>https://github.com/detectlanguage/detectlanguage-dotnet</RepositoryUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageIconUrl>https://www.nuget.org/profiles/detectlanguage/avatar?imageSize=128</PackageIconUrl>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
     <PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <None Include="..\README.md" Pack="true" PackagePath=""/>
   </ItemGroup>
 

mise.toml

@@ -1,5 +1,5 @@
 [tools]
-dotnet = "2.2"
+dotnet = "8"
 
 [env]
 _.file = ".env.local"