Don't target .NET6 until it's stable/released

Author: kzu

src/dotnet-echo/EchoService.cs

@@ -1,4 +1,5 @@
-using Grpc.Core;
+using System.Threading.Tasks;
+using Grpc.Core;
 
 namespace Devlooped
 {

src/dotnet-echo/Program.cs

@@ -1,8 +1,13 @@
-using System.CommandLine;
+using System;
+using System.CommandLine;
 using System.CommandLine.Invocation;
+using System.IO;
+using System.Linq;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography;
 using System.Security.Cryptography.X509Certificates;
+using System.Threading;
+using System.Threading.Tasks;
 using Devlooped;
 using DotNetConfig;
 using Humanizer;
@@ -12,6 +17,7 @@
 using NuGet.Configuration;
 using NuGet.Protocol.Core.Types;
 using NuGet.Versioning;
+using Spectre.Console;
 
 #if !CI
 AnsiConsole.MarkupLine($"[lime]dotnet echo [/]{string.Join(' ', args)}");

src/dotnet-echo/Startup.cs

@@ -1,9 +1,11 @@
 using System.Buffers;
 using System.IO.Pipelines;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.DependencyInjection;
+using Spectre.Console;
 
 namespace Devlooped
 {

src/dotnet-echo/dotnet-echo.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>echo</AssemblyName>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net6.0;net5.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>net5.0;netcoreapp3.1</TargetFrameworks>
     <RootNamespace>Devlooped</RootNamespace>
     <LangVersion>preview</LangVersion>
     <PackageId>dotnet-echo</PackageId>
@@ -32,13 +32,4 @@
     <None Include="..\..\readme.md" PackagePath="readme.md" Pack="true" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Import Include="Spectre.Console" />
-    <Import Include="System" />
-    <Import Include="System.IO" />
-    <Import Include="System.Linq" />
-    <Import Include="System.Threading" />
-    <Import Include="System.Threading.Tasks" />
-  </ItemGroup>
-
 </Project>