extension NSDate: DatabaseValueConvertible
NSDate is stored in the database using the format “yyyy-MM-dd HH:mm:ss.SSS”, in the UTC time zone.
Returns a date initialized from dbValue, if possible.
If database value contains a number, that number is interpreted as a timeinterval since 00:00:00 UTC on 1 January 1970.
If database value contains a string, that string is interpreted as a SQLite date in the UTC time zone. Nil is returned if the date string does not contain at least the year, month and day components. Other components (minutes, etc.) are set to zero if missing.
public static func fromDatabaseValue(_ dbValue: DatabaseValue) -> `Self`?