feat: Upgrade to .NET 8 (#164)

Author: berviantoleo

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '6.0.x'
+        dotnet-version: '8.0.x'
         dotnet-quality: 'preview'
     - name: Install dependencies
       run: dotnet restore

GraphQLNetExample/GraphQLNetExample.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
@@ -12,12 +12,12 @@
     <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="7.6.0" />
     <PackageReference Include="GraphQL.Server.Ui.Altair" Version="7.6.0" />
     <PackageReference Include="GraphQL.SystemTextJson" Version="7.6.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.13">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.13" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.13">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

README.md

@@ -1,6 +1,6 @@
 # GraphQL .NET Example
 
-GraphQL example implementation in .NET 6.
+GraphQL example implementation in .NET 8.
 
 ## Notice