also net 8 build

Author: ionite34

MinimalApiMapper.Abstractions/MinimalApiMapper.Abstractions.csproj

@@ -2,7 +2,7 @@
     <Import Project="..\Nuget.props" />
 
     <PropertyGroup>
-        <TargetFrameworks>netstandard2.0;net9.0</TargetFrameworks>
+        <TargetFrameworks>netstandard2.0;net8.0;net9.0</TargetFrameworks>
         <LangVersion>latest</LangVersion>
         <IsPackable>true</IsPackable>
         <ImplicitUsings>enable</ImplicitUsings>