target the CLI and Tests projects to .NET 9.0

this also enables json reflection serializer in the trimmed executable
because of introduction of the breaking change in .NET 8 Preview 7

see: https://learn.microsoft.com/en-us/dotnet/core/compatibility/serialization/8.0/publishtrimmed

Author: zrckr

Interface/FEZRepacker.Interface.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <AssemblyName>$(SolutionName)</AssemblyName>
     <LangVersion>latest</LangVersion>
 
@@ -14,6 +14,7 @@
     <ProduceReferenceAssembly>false</ProduceReferenceAssembly>
     <PublishSingleFile>true</PublishSingleFile>
     <PublishTrimmed>true</PublishTrimmed>
+    <JsonSerializerIsReflectionEnabledByDefault>true</JsonSerializerIsReflectionEnabledByDefault>
   </PropertyGroup>
 
   <ItemGroup>

Tests/FEZRepacker.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <LangVersion>latest</LangVersion>