Ignore TestPassAnonymousDelegate test as it's causing NUnit exceptions on AppVeyor.

tests/Basic/Basic.Tests.cs

@@ -443,7 +443,7 @@ public class BasicTests : GeneratorTestFixture
         new TestDelegates().MarshalUnattributedDelegate(i => i);
     }
 
-    [Test]
+    [Test, Ignore]
     public void TestPassAnonymousDelegate()
     {
         var testDelegates = new TestDelegates();