Checks the schema version of raw subreddit config data and attempts to update
it to the latest known schema version if it's out of date. Throws an error if
the data's current schema version is too old or new to handle.
Parameters
data: any
The subreddit config data object read from the wiki, as an object
(i.e. you should parse the page contents as JSON to pass into this function)
Checks the schema version of raw subreddit config data and attempts to update it to the latest known schema version if it's out of date. Throws an error if the data's current schema version is too old or new to handle.