Support for Data Change Notification Callbacks (sqlite3_update_hook)

It would be really nice to have support for Data Change Notification Callbacks, which are implemented in the SQLite C interface by the [sqlite3_update_hook()](https://www.sqlite.org/c3ref/update_hook.html) function.

We would like to access db from multiple worker threads and leverage update hooks to be notified of changes whenever one of the threads makes changes.