fix(event-loop): fix the Future object is not initialized error and the segfault that follows

It's still a reference count issue as always.

When JS throws an error in a Promise wrapper, it will only show the actual JS error instead of a Python exception `asyncio.exceptions.InvalidStateError: Future object is not initialized.`

Author: Xmader

src/PyEventLoop.cc

@@ -119,6 +119,7 @@ PyEventLoop::Future PyEventLoop::ensureFuture(PyObject *awaitable) {
   Py_DECREF(args);
   Py_DECREF(kwargs);
 
+  Py_INCREF(futureObj); // needs to be kept alive as `PyEventLoop::Future` will decrease the reference count in its destructor
   return PyEventLoop::Future(futureObj);
 }