NuGet updates.

Author: MrKWatkins

examples/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="FluentAssertions" Version="6.12.0" />
     <PackageVersion Include="JetBrains.Annotations" Version="2023.3.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageVersion Include="NUnit" Version="3.13.3" />
+    <PackageVersion Include="NUnit" Version="4.0.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 </Project>

examples/Listeners/Expression.cs

@@ -3,6 +3,4 @@ namespace MrKWatkins.Ast.Examples.Listeners;
 /// <summary>
 /// Base node type for the example.
 /// </summary>
-public abstract class Expression : Node<Expression>
-{
-}
+public abstract class Expression : Node<Expression>;

src/Directory.Packages.props

@@ -6,11 +6,11 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="coverlet.collector" Version="6.0.0" />
-      <PackageVersion Include="FluentAssertions" Version="6.12.0"/>
-      <PackageVersion Include="JetBrains.Annotations" Version="2023.3.0"/>
-      <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0"/>
-      <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0"/>
-    <PackageVersion Include="NUnit" Version="3.13.3" />
+    <PackageVersion Include="FluentAssertions" Version="6.12.0"/>
+    <PackageVersion Include="JetBrains.Annotations" Version="2023.3.0"/>
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0"/>
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0"/>
+    <PackageVersion Include="NUnit" Version="4.0.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 </Project>

src/MrKWatkins.Ast.Tests/ChildrenTests.Enumerator.cs

@@ -277,5 +277,7 @@ public void GetEnumerator_Untyped()
         enumerator.Current.Should().BeSameAs(C3);
 
         enumerator.MoveNext().Should().BeFalse();
+
+        (enumerator as IDisposable)?.Dispose();
     }
 }

src/MrKWatkins.Ast/Node.Messages.cs

@@ -112,7 +112,7 @@ public void AddMessage(Message message)
 
     /// <summary>
     /// Lazily enumerates over this nodes and its descendents returning only those that have <see cref="Message">Messages</see> with
-    /// <see cref="Message.Level" /> <see cref="MessageLevel.Warning" />,.
+    /// <see cref="Message.Level" /> <see cref="MessageLevel.Warning" />.
     /// </summary>
     public IEnumerable<TNode> ThisAndDescendentsWithWarnings => ThisAndDescendents.Where(n => n.HasWarnings);