v2.8.0

1. Removed company_driver.detached tracksim event listening
2. Added "update discord email" when user reconnects discord account and email is not connected
3. Added config.discord_guild_message_replace_rules for manipulating discord message content before sending
   Config format: {regex_match_rule_1(str): regex_replace_rule_1(str), ..., regex_match_rule_n(str): regex_replace_rule_n(str)}
4. Added distance-based division points
   Config format: {"id": int, "name": str, "role_id": int, "points": {"mode": str("static"|"ratio"), "value": int|float}}
   When mode is static, each validated division delivery gets static points.
   When mode is ratio, each validated division delivery gets distance * value points.
   Note: Points of previously validated division deliveries will be updated when config is updated.
5. Added support to multiple rankings
   Hint: This function mainly focuses on providing multiple rank roles.
   Config format: [{"id": int, "name": str, "default": bool, "point_types": list: ["distance", "challenge", "division", "event", "bonus"], "details": ...original_ranks}]
   At least one item must have default = true, otherwise the first one will be considered default. The default ranking will be used for daily_bonus and distance_bonus. Specific rank_type_id will only be considered when user is requesting discord role for a specific rank type.
   point_types must be a list with str items selected from ["distance", "challenge", "division", "event", "bonus"].
   details have the same format has the original config.ranks.
6. TO BE REVEALED