add net8.0 targets

Author: janusw

src/GeoJSON.Net.Tests/GeoJSON.Net.Tests.csproj

@@ -4,7 +4,7 @@
     <ProjectGuid>{6C93B314-9208-4684-B873-172F7EC81689}</ProjectGuid>
     <RootNamespace>GeoJSON.Net.Tests</RootNamespace>
     <AssemblyName>GeoJSON.Net.Tests</AssemblyName>
-    <TargetFrameworks>net462;net6.0</TargetFrameworks>
+    <TargetFrameworks>net462;net6.0;net8.0</TargetFrameworks>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>
   <ItemGroup>

src/GeoJSON.Net/GeoJSON.Net.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;net462;net6.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net462;net6.0;net8.0</TargetFrameworks>
     <Description>.Net types for the GeoJSON RFC to be used with Json.Net</Description>
     <Authors>Matt Hunt;Joerg Battermann;Xavier Fischer</Authors>
     <Company>GeoJSON.Net</Company>