* Add support to update strategy.
* Add JavaDoc and bump the LIB_VERSION_MAX constant.
* Fix a word typo.
* Store update strategy enum as integer in the DB.
- Defaults to every 12 hours
- Minimum number of backups is now 2, just to offer some level of redundancy in case something happens
- If it's missing storage permissions, it'll fail but that's the user's loss if they somehow haven't granted that permission yet
