Describe a bug.

Steps to reproduce:

1. Implement onChange callback that throws an exception.

onChange: () => {
  throw new Error();
}

2. Modify anywhere and dispatch onChange.

3. Throws an exception.

4. onChange can't be dispatched next time.

Expected behavior:
onChange is dispatched after onChange callback throws an exception

Editor.js version: 2.18.0

It seems that modificationObserver is disabled after onChange callback throws an exception.
It can be resolved by using try {} finally {} sentence.