Dropped node 18 support

Author: stesee

.github/workflows/dotnet.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, ubuntu-latest]
-        node: ['18', '20', '22']
+        node: ['20', '22']
     steps:
     - uses: actions/checkout@v4
     - name: Setup .NET

PdfJsSharp/PdfJsWrapper.cs

@@ -19,7 +19,7 @@ namespace Codeuctivity.PdfjsSharp
     public class PdfJsWrapper : IDisposable
     {
         internal const int windowsMaxPathLength = 206;
-        internal static readonly SemaphoreSlim semaphore = new SemaphoreSlim(1, 1);
+        internal static readonly SemaphoreSlim semaphore = new(1, 1);
         internal bool useCustomNodeModulePath;
         internal string pathToNodeModules = default!;
         internal string pathToTempFolder = default!;
@@ -28,7 +28,7 @@ public class PdfJsWrapper : IDisposable
         /// <summary>
         /// Supported node versions
         /// </summary>
-        private readonly ImmutableArray<int> SupportedNodeVersions = ImmutableArray.Create(18, 20, 22);
+        private readonly ImmutableArray<int> SupportedNodeVersions = [20, 22];
 
         internal bool IsInitialized { get; set; }
 

PdfJsSharpTests/NodeVersionDetectorTest.cs

@@ -16,7 +16,7 @@ public void ShouldDetectNodeVersionAsync()
         [Fact]
         public void ShouldDetermineInstalledVersionAsync()
         {
-            var actualInstalledVersion = NodeVersionDetector.CheckRequiredNodeVersionInstalled(Rasterizer.NodeExecutablePath, new[] { 8, 18, 20, 22 });
+            var actualInstalledVersion = NodeVersionDetector.CheckRequiredNodeVersionInstalled(Rasterizer.NodeExecutablePath, new[] { 8, 20, 22 });
             Assert.True(actualInstalledVersion > 6);
         }
 

README.md

@@ -13,7 +13,7 @@ Brings [PDF.js](https://github.com/mozilla/pdf.js) to .net
 get
 
 - NodeJs
-  - node 18, 20 or 22 x64 (older node versions are supported by older PDFjsSharp versions)
+  - node 20 or 22 x64 (older node versions are supported by older PDFjsSharp versions)
 
 ## HowTo use