Fix test

src/tests/Integration/Gee.vala

@@ -15,7 +15,7 @@ void gee_tests() {
 
     Test.add_func("/invercargill/conversion/gee/iterable", () => {
         var items = ate(new int[] { 1, 2, 3, 4, 5, 6});
-        var result = items.to_iterable();
+        var result = items.as_iterable();
 
         var i = 1;
         foreach (var item in result) {