Make sure promise polls spawner

Author: richarddavison

core/src/value/promise.rs

@@ -177,6 +177,12 @@ where
             return Poll::Ready(x);
         }
 
+        let opaque: &mut crate::runtime::raw::Opaque = unsafe {
+            let rt = qjs::JS_GetRuntime(this.promise.ctx.as_ptr());
+            &mut *(qjs::JS_GetRuntimeOpaque(rt) as *mut _)
+        };
+        opaque.spawner().poll(cx);
+
         if this.state.is_none() {
             let inner = Rc::new(RefCell::new(cx.waker().clone()));
             this.state = Some(inner.clone());