fix build

Author: leastprivilege

build/Program.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Threading.Tasks;
 using static Bullseye.Targets;
 using static SimpleExec.Command;
 
@@ -22,7 +23,7 @@ private static class Targets
             public const string SignPackage = "sign-package";
         }
 
-        internal static void Main(string[] args)
+        static async Task Main(string[] args)
         {
             Target(Targets.RestoreTools, () =>
             {
@@ -67,7 +68,7 @@ internal static void Main(string[] args)
 
             Target("sign", DependsOn(Targets.Test, Targets.SignPackage));
 
-            RunTargetsAndExit(args, ex => ex is SimpleExec.NonZeroExitCodeException || ex.Message.EndsWith(envVarMissing));
+            await RunTargetsAndExitAsync(args, ex => ex is SimpleExec.ExitCodeException || ex.Message.EndsWith(envVarMissing));
         }
 
         private static void SignNuGet()

build/build.csproj

@@ -2,12 +2,12 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Bullseye" Version="3.5.0" />
-    <PackageReference Include="SimpleExec" Version="6.3.0" />
+    <PackageReference Include="Bullseye" Version="4.2.1" />
+    <PackageReference Include="SimpleExec" Version="11.0.0" />
   </ItemGroup>
 
 </Project>