Updated to .NET 9 and bumped version number to 1.5.0

Author: gordon-matt

elFinder.NetCore.Web/elFinder.NetCore.Web.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <UserSecretsId>a13535c9-0a1e-4ed1-8437-bafcc87a57a9</UserSecretsId>
     <NeutralLanguage>en-US</NeutralLanguage>
     <Authors>Yevhen Noskov, Leniel Macaferi, Matt Gordon, Flavio Smirne</Authors>

elFinder.NetCore/elFinder.NetCore.csproj

@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
-    <TargetFrameworks>net8.0</TargetFrameworks>
+    <TargetFrameworks>net9.0</TargetFrameworks>
     <Authors>Yevhen Noskov, Leniel Macaferi, Matt Gordon, Flavio Smirne</Authors>
     <Company>N/A</Company>
     <NeutralLanguage>en-US</NeutralLanguage>
     <Description>elFinder ASP.NET Core backend</Description>
     <PackageProjectUrl>https://github.com/gordon-matt/elFinder.NetCore</PackageProjectUrl>
-    <Version>1.4.2</Version>
+    <Version>1.5.0</Version>
     <PackageLicenseUrl>
     </PackageLicenseUrl>
     <OutputType>Library</OutputType>
@@ -21,6 +21,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="SixLabors.ImageSharp" Version="3.1.7" />
-    <PackageReference Include="System.Text.Json" Version="8.0.5" />
+    <PackageReference Include="System.Text.Json" Version="9.0.3" />
   </ItemGroup>
 </Project>