Merge branch 'release/9.0.0'

* release/9.0.0:
  (#134) Update to use Cake 5.0.0

Author: gep13

src/Cake.AppVeyor.Tests/Cake.AppVeyor.Tests.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Cake.Testing" Version="4.0.0" />
+    <PackageReference Include="Cake.Testing" Version="5.0.0" />
     <PackageReference Include="coverlet.msbuild" Version="6.0.4">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>

src/Cake.AppVeyor/Cake.AppVeyor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
@@ -32,8 +32,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Cake.Common" Version="4.0.0" PrivateAssets="All" />
-    <PackageReference Include="Cake.Core" Version="4.0.0" PrivateAssets="All" />
+    <PackageReference Include="Cake.Common" Version="5.0.0" PrivateAssets="All" />
+    <PackageReference Include="Cake.Core" Version="5.0.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>

test.cake

@@ -1,4 +1,4 @@
-#reference "BuildArtifacts/temp/_PublishedLibraries/Cake.AppVeyor/net6.0/Cake.AppVeyor.dll"
+#reference "BuildArtifacts/temp/_PublishedLibraries/Cake.AppVeyor/net9.0/Cake.AppVeyor.dll"
 #addin nuget:?package=Refit&version=9.0.2
 
 public class BuildData