Bug with recursive extension functions

[caesay]

I added the following test toExtensionFixture.cs :

        [Test]
        public void TestRecursiveCustomExtension()
        {
            var variables = new VariableDictionary();
            variables.Add("Foo", "Bar");

            variables.AddExtension("supercoolfunc", SuperCoolFunc!);
            variables.Add("Var1", "#{Foo|supercoolfunc}");
            variables.Add("Var2", "#{Var1}");
            
            var result = variables.Get("Var2");
            result.Should().Be("2-1-18");
        }

This should work fine, but actually the test fails, and the result is #{Foo|supercoolfunc}.

The bug can be fixed by updating the EvaluationContext to pass extensions to nested contexts.

On EvaluationContext.cs line 125, change:

var context = new EvaluationContext(new Binding(), x, this);

to:

var context = new EvaluationContext(new Binding(), x, this, Extensions);