Add .NET 6.0 support; upgrade SDK versions

Author: jburnett

.github/workflows/dotnet-core.yml

@@ -13,14 +13,18 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - name: Setup .NET 6.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 6.0.100
     - name: Setup .NET 5.0
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.401
+        dotnet-version: 5.0.403
     - name: Setup .NET Core 3.1
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.1.413
+        dotnet-version: 3.1.415
     - name: Install dependencies
       run: dotnet restore
     - name: Build

AMT.LinqExtensions/AMT.LinqExtensions.csproj

@@ -16,20 +16,22 @@
     <GenerateNeutralResourcesLanguageAttribute />
 
     <Description>A few LINQ Extensions we find useful.</Description>
-    <PackageReleaseNotes>Supports .NET Core 3.1 &amp; .NET 5.0</PackageReleaseNotes>
+    <PackageReleaseNotes>Supports .NET Core 3.1, .NET 5.0, &amp; .NET 6.0</PackageReleaseNotes>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/AltaModaTech/LINQExtensions</PackageProjectUrl>
     <PackageTags>LINQ</PackageTags>
     <Title>LINQ Extensions by AltaModa Technologies</Title>
   </PropertyGroup>
 
 <!--
+  .NET 6.0 (LTS) EOL 11/8/2024
   .NET Core 3.1 (LTS) EOL 12/3/2022
+  .NET 5.0 EOL 5/8/2022
   .NET Core 2.1 (LTS) EOL 8/21/2021
   .NET Core 1.1 EOL 6/27/2019
 -->
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.1;net5.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
 </Project>

test/test.csproj

@@ -8,12 +8,14 @@
   </PropertyGroup>
 
 <!--
+  .NET 6.0 (LTS) EOL 11/8/2024
   .NET Core 3.1 (LTS) EOL 12/3/2022
+  .NET 5.0 EOL 5/8/2022
   .NET Core 2.1 (LTS) EOL 8/21/2021
   .NET Core 1.1 EOL 6/27/2019
 -->
   <PropertyGroup>
-      <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
+      <TargetFrameworks>netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>