NSwag.Commands: Microsoft.Extensions.PlatformAbstractions Is Deprecated

[lieven121]

Describe the bug

Microsoft.Extensions.PlatformAbstractions is deprecated
https://learn.microsoft.com/en-us/dotnet/core/compatibility/core-libraries/5.0/platformabstractions-package-removed

This package also has sub dependencies with vulnerabilities

Version used

14.2.0

Notes
Might help
System.Reflection.Assembly.GetEntryAssembly().GetCustomAttribute()

but you need to extract the version manually

I would create a PR that replaces the 2 lines of code (and extracts the version) but I am not sure if I understand the implications.
and the whole, substring the version might not be that good.

The file impacted would be
RuntimeUtilities

//-----------------------------------------------------------------------
// <copyright file="RuntimeUtilities.cs" company="NSwag">
//     Copyright (c) Rico Suter. All rights reserved.
// </copyright>
// <license>https://github.com/RicoSuter/NSwag/blob/master/LICENSE.md</license>
// <author>Rico Suter, [email protected]</author>
//-----------------------------------------------------------------------

#if !NETFRAMEWORK
using System.Reflection;
using System.Runtime.Versioning;
using System.Globalization;
#endif



namespace NSwag.Commands
{
    /// <summary>Provides runtime utilities.</summary>
    public class RuntimeUtilities
    {
        /// <summary>Gets the current runtime.</summary>
        public static Runtime CurrentRuntime
        {
            get
            {
#if NETFRAMEWORK
                return IntPtr.Size == 4 ? Runtime.WinX86 : Runtime.WinX64;
#else
                var target = Assembly.GetEntryAssembly()?.GetCustomAttribute<TargetFrameworkAttribute>();

                if (target == null || !target.FrameworkName.StartsWith(".NETCoreApp", StringComparison.OrdinalIgnoreCase))
	                return IntPtr.Size == 4 ? Runtime.WinX86 : Runtime.WinX64;

                var version = target.FrameworkName.Substring(target.FrameworkName.IndexOf("Version=v", StringComparison.OrdinalIgnoreCase) + 9);
                var majorV = int.Parse(version.Split('.')[0], CultureInfo.InvariantCulture);

                if(majorV >= 9)
	                return Runtime.Net90;

                return Runtime.Net80;
#endif
            }
        }
    }
}

[lahma]

#5058