Upgrade CodeGen to net5.0 and upgrade nugets

Author: angularsen

CodeGen/CodeGen.csproj

@@ -2,17 +2,17 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp5.0</TargetFramework>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <!-- Allow compile with various nullability warnings until fixed. -->
     <WarningsNotAsErrors>8600,8601,8603,8604,8618,8619,8625</WarningsNotAsErrors>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="NuGet.Protocol" Version="5.9.0" />
-    <PackageReference Include="Serilog" Version="2.9.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="NuGet.Protocol" Version="5.9.1" />
+    <PackageReference Include="Serilog" Version="2.10.0" />
     <PackageReference Include="Serilog.Sinks.Console" Version="3.1.1" />
     <PackageReference Include="System.CommandLine.DragonFruit" Version="0.2.0-alpha.19174.3" />
   </ItemGroup>