Improve performance and drop support for old frameworks (#2068)

* Remove WebSocket4Net extension library

* Remove UWP support

* Drop support for all old frameworks

* Update CI

* Update CI

* Update CI

* Update CI

* Remove obsolete code

* Set default protocol version to 5.0.0

* Remove obsolete tests

* Remove old dependencies

* Reset release notes

* Move server to dedicated project

* Fix unit tests

* Update and cleanup nuget packages

* Fix unit tests
Refactor code

* No longer throw exception when receiving non success CONNACK

* Enable nuget signing

* Enable nuget signing

* Enable nuget signing

* Enable nuget signing

* Enable nuget signing

* Enable nuget signing

* Enable nuget signing

* Enable nuget signing

* Enable code signing

* Enable code signing

* Enable code signing

* Fix client endpoint handling

* Improve CI

* Fix CI

* Fix CI

* Fix CI

* Fix CI

* Import changes from version 4

* Cleanup target frameworks and remove obsolete code

* Drop support for dotnet7.0

* Remove managed client

* Version5 auditmode (#2016)

Added NuGet audit mode and some other settings to get informed about security issues.

* Address warnings from analyzers

* Support for ReadOnlySequence as payload (#2046)

* use ReadOnlySequence as payload

* fix build

* fix build

* skip sign in forks

* remove unnecessary owner

* tests and extensions

* remove test

* simplify WritePacketBuffer, remove unused helper

* Adjust namespaces

* Fix build errors

* Import latest fixes from main branch

* Adjust namespaces

---------

Co-authored-by: SeppPenner <HansM2013@gmx.de>
Co-authored-by: Martin Regen <mregen@microsoft.com>

Source/MQTTnet.Extensions.Rpc/MQTTnet.Extensions.Rpc.csproj

@@ -1,10 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1;netcoreapp3.1;net5.0;net6.0;net7.0</TargetFrameworks>
-        <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net452;net461;net48</TargetFrameworks>
-        <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' AND '$(MSBuildRuntimeType)' != 'Core' ">$(TargetFrameworks);uap10.0</TargetFrameworks>
-        
+        <TargetFrameworks>net8.0</TargetFrameworks>
         <AssemblyName>MQTTnet.Extensions.Rpc</AssemblyName>
         <RootNamespace>MQTTnet.Extensions.Rpc</RootNamespace>
         <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
@@ -33,21 +30,11 @@
         <PackageReleaseNotes>For release notes please go to MQTTnet release notes (https://www.nuget.org/packages/MQTTnet/).</PackageReleaseNotes>
         <DisableImplicitAspNetCoreAnalyzers>true</DisableImplicitAspNetCoreAnalyzers>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
-        <NoWarn>1591;NETSDK1138</NoWarn>
-        <LangVersion>7.3</LangVersion>
-    </PropertyGroup>
-
-    <PropertyGroup Condition="'$(TargetFramework)' == 'uap10.0'">
-        <CopyLocalLockFileAssemblies>false</CopyLocalLockFileAssemblies>
-        <NugetTargetMoniker>UAP,Version=v10.0</NugetTargetMoniker>
-        <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
-        <TargetPlatformVersion>10.0.18362.0</TargetPlatformVersion>
-        <TargetPlatformMinVersion>10.0.10240.0</TargetPlatformMinVersion>
-        <TargetFrameworkIdentifier>.NETCore</TargetFrameworkIdentifier>
-        <TargetFrameworkVersion>v5.0</TargetFrameworkVersion>
-        <DefineConstants>$(DefineConstants);WINDOWS_UWP</DefineConstants>
-        <DefaultLanguage>en</DefaultLanguage>
-        <LanguageTargets>$(MSBuildExtensionsPath)\Microsoft\WindowsXaml\v$(VisualStudioVersion)\Microsoft.Windows.UI.Xaml.CSharp.targets</LanguageTargets>
+        <NoWarn>1591;NETSDK1138;NU1803;NU1901;NU1902</NoWarn>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+        <NuGetAuditMode>all</NuGetAuditMode>
+        <NuGetAudit>true</NuGetAudit>
+        <AnalysisLevel>latest-Recommended</AnalysisLevel>
     </PropertyGroup>
 
     <ItemGroup>
@@ -56,13 +43,13 @@
             <PackagePath>\</PackagePath>
         </None>
     </ItemGroup>
-    
+
     <ItemGroup>
-        <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
+        <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All"/>
     </ItemGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\MQTTnet\MQTTnet.csproj" />
+        <ProjectReference Include="..\MQTTnet\MQTTnet.csproj"/>
     </ItemGroup>
 
 </Project>