Fix function property order (#2305)

This Pull Request changes the following:

- Fix function property order

boa_engine/src/vm/code_block.rs

@@ -538,17 +538,17 @@ pub(crate) fn create_function_object(
         .configurable(false)
         .build();
 
-    if !r#async {
     constructor
-            .define_property_or_throw("prototype", prototype_property, context)
-            .expect("failed to define the prototype property of the function");
-    }
+        .define_property_or_throw("length", length_property, context)
+        .expect("failed to define the length property of the function");
     constructor
         .define_property_or_throw("name", name_property, context)
         .expect("failed to define the name property of the function");
+    if !r#async {
         constructor
-        .define_property_or_throw("length", length_property, context)
-        .expect("failed to define the length property of the function");
+            .define_property_or_throw("prototype", prototype_property, context)
+            .expect("failed to define the prototype property of the function");
+    }
 
     constructor
 }