Add support for .NET 9.0 in project file (#744)

* Add support for .NET 9.0 in project file

Updated TargetFrameworks in MiniExcelLibs.csproj to include 'net9.0', expanding support beyond net45, netstandard2.0, and net8.0.

* Update workflows for .NET 9

- Added setup for .NET 9.0.x in `codeql-analysis.yml`.
- Added setup for .NET 9.0.x in `dotnet.yml`.

Author: Notallthatevil

.github/workflows/codeql-analysis.yml

@@ -39,6 +39,11 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
+      
+    - name: Setup .NET 9
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 9.0.x
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/dotnet.yml

@@ -13,10 +13,14 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Setup .NET
+    - name: Setup .NET 8
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: 8.0.x
+    - name: Setup .NET 9
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 9.0.x
     - name: Restore dependencies
       run: dotnet restore
       env:

src/MiniExcel/MiniExcelLibs.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<TargetFrameworks>net45;netstandard2.0;net8.0;</TargetFrameworks>
+		<TargetFrameworks>net45;netstandard2.0;net8.0;net9.0</TargetFrameworks>
 		<Version>1.39.0</Version>
 	</PropertyGroup>
 	<PropertyGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">