await-ing in repl mode

[teidesu]

repro

1. go to https://chii.liriliri.io/playground/test/iframe.html
2. try running await new Promise(resolve => resolve(42))

expected

42 is shown as the expression result

actual

an error is thrown:

[teidesu]

chobitsu.patch

was able to make it work with this crude patch but not sure if this is the best way to do so + we would probably also want some kind of timeout just in case

(also is there any specific reason releaseObject is noop-ed while being implemented in runtime domain? sounds like a recipe for a memory leak 🙃)