chore: update NuGet referenced packages + DotNet SDK (#88)

Author: vbaderks

Directory.Packages.props

@@ -1,13 +1,13 @@
 <Project>
   <ItemGroup>
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="SharpFuzz" Version="2.2.0" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
-    <PackageVersion Include="xunit.v3" Version="3.0.1" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4" />
+    <PackageVersion Include="xunit.v3" Version="3.1.0" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="coverlet.collector" Version="6.0.4" />
-    <PackageVersion Include="BenchmarkDotNet" Version="0.15.2" />
+    <PackageVersion Include="BenchmarkDotNet" Version="0.15.4" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
-    <PackageVersion Include="System.Drawing.Common" Version="9.0.8" />
+    <PackageVersion Include="System.Drawing.Common" Version="9.0.10" />
   </ItemGroup>
 </Project>

README.md

@@ -12,7 +12,7 @@ JPEG-LS (ISO-14495-1) is a lossless/near-lossless compression standard for conti
 
 ## Features
 
-* .NET 8.0 class library.
+* .NET 9.0, .NET 8.0 class library.
 * Support for the .NET platforms: Windows, Linux and macOS.
 
 ## Performance
@@ -86,7 +86,7 @@ A sample application is included in the GitHub repository that demonstrates how
  git clone https://github.com/team-charls/charls-dotnet.git
 ```
 
-* Use the .NET 8.0 CLI or Visual Studio 2022 (v17.11 or newer) to build the solution file CharLSDotNet.sln.  
+* Use the .NET 9.0 CLI or Visual Studio 2022 (v17.14 or newer) to build the solution file CharLSDotNet.slnx.  
  For example: `dotnet build && dotnet test && dotnet publish` to build the NuGet package.  
  Building can be done on all supported .NET SDK platforms: Windows, Linux or macOS
 

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "9.0.200",
+    "version": "9.0.306",
     "rollForward": "latestFeature",
     "allowPrerelease": false
   }