Method postCallback

quickjs/src/main/java/com/fongmi/quickjs/method/Global.java:215–219

(JSFunction callback, Runnable runnable)

    }

    private boolean postCallback(JSFunction callback, Runnable runnable) {
        boolean posted = submit(() -> callAndRelease(callback, runnable));
        if (!posted) callback.release();
        return posted;
    }

    private void callAndRelease(JSFunction callback, Runnable runnable) {
        try {