✨Add rank_range column

[rutko]

Changed

ref #101

add rank_range column

[1] pry(main)> Team.find(1)
   (0.7ms)  SET NAMES utf8mb4,  @@SESSION.sql_mode = CONCAT(CONCAT(@@sql_mode, ',STRICT_ALL_TABLES'), ',NO_AUTO_VALUE_ON_ZERO'),  @@SESSION.sql_auto_is_null = 0, @@SESSION.wait_timeout = 2147483
  Team Load (0.7ms)  SELECT `teams`.* FROM `teams` WHERE `teams`.`id` = 1 LIMIT 1
=> #<Team:0x000055bb6982fc38
 id: 1,
 body: "hi",
 summoner_name: "tokimu",
 skype: "",
 discord: "",
 created_at: Mon, 26 Oct 2020 02:12:49 JST +09:00,
 updated_at: Mon, 26 Oct 2020 02:12:49 JST +09:00,
 password_digest: [FILTERED],
 profile_image: 3174,
 gender: "man",
 rank_range: "GOLD">

[4] pry(main)> Team.find(4)
  Team Load (0.7ms)  SELECT `teams`.* FROM `teams` WHERE `teams`.`id` = 4 LIMIT 1
=> #<Team:0x0000557dee311e08
 id: 4,
 body: "Hi",
 summoner_name: "222cm",
 skype: "",
 discord: "",
 created_at: Mon, 26 Oct 2020 02:34:17 JST +09:00,
 updated_at: Mon, 26 Oct 2020 02:34:17 JST +09:00,
 password_digest: [FILTERED],
 profile_image: 4783,
 gender: "man",
 rank_range: "UNRANK">

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