Migrate to .NET9 SDK (#59)

Author: sungam3r

.github/workflows/benchmarks.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
 
       - name: Run benchmarks
         working-directory: src/Benchmarks

.github/workflows/codeql-analysis.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Setup .NET SDK
       uses: actions/setup-dotnet@v4
       with:
-         dotnet-version: 8.0.x
+         dotnet-version: 9.0.x
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v3

.github/workflows/publish-preview.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
           source-url: https://nuget.pkg.github.com/destructurama/index.json
         env:
           NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}

.github/workflows/publish-release.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
           source-url: https://api.nuget.org/v3/index.json
         env:
           NUGET_AUTH_TOKEN: ${{secrets.NUGET_AUTH_TOKEN}}

.github/workflows/test.yml

@@ -35,10 +35,7 @@ jobs:
       - name: Setup .NET SDKs
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: |
-            6.0.x
-            7.0.x
-            8.0.x
+          dotnet-version: 9.0.x
           source-url: https://nuget.pkg.github.com/destructurama/index.json
         env:
           NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}

src/Benchmarks/Benchmarks.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <NoWarn>$(NoWarn);1591</NoWarn>
     <IsPackable>false</IsPackable>
   </PropertyGroup>

src/Destructurama.ByIgnoring.Tests/Destructurama.ByIgnoring.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFramework>net9.0</TargetFramework>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <NoWarn>$(NoWarn);1591</NoWarn>
   </PropertyGroup>