[BridgeBidding] Update to v0 (#967)

README.md

@@ -111,7 +111,7 @@ Use `pgx.available_envs() -> Tuple[EnvId]` to see the list of currently availabl
 |<a href="https://en.wikipedia.org/wiki/2048_(video_game)">2048</a> <br> `"2048"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/2048_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/2048_light.gif" width="60px">| `v0` | *Merge tiles to create 2048.* |
 |<a href="https://en.wikipedia.org/wiki/D%C5%8Dbutsu_sh%C5%8Dgi">Animal Shogi</a><br>`"animal_shogi"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/animal_shogi_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/animal_shogi_light.gif" width="60px">|  `v0` | *Animal-themed child-friendly shogi.* |
 |<a href="https://en.wikipedia.org/wiki/Backgammon">Backgammon</a><br>`"backgammon"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/backgammon_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/backgammon_light.gif" width="60px">| `v0` | *Luck aids bearing off checkers.* |
-|<a href="https://en.wikipedia.org/wiki/Contract_bridge">Bridge bidding</a><br>`"bridge_bidding"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/bridge_bidding_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/bridge_bidding_light.gif" width="60px">| `beta` | *Partners exchange information via bids.* |
+|<a href="https://en.wikipedia.org/wiki/Contract_bridge">Bridge bidding</a><br>`"bridge_bidding"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/bridge_bidding_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/bridge_bidding_light.gif" width="60px">| `v0` | *Partners exchange information via bids.* |
 |<a href="https://en.wikipedia.org/wiki/Chess">Chess</a><br>`"chess"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/chess_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/chess_light.gif" width="60px">| `v0` | *Checkmate opponent's king to win.* |
 |<a href="https://en.wikipedia.org/wiki/Connect_Four">Connect Four</a><br>`"connect_four"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/connect_four_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/connect_four_light.gif" width="60px">| `v0` | *Connect discs, win with four.* |
 |<a href="https://en.wikipedia.org/wiki/Minichess">Gardner Chess</a><br>`"gardner_chess"`|<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/gardner_chess_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/gardner_chess_light.gif" width="60px">| `v0` | *5x5 chess variant, excluding castling.* |

pgx/bridge_bidding.py

@@ -206,7 +206,7 @@ def id(self) -> v1.EnvId:
 
     @property
     def version(self) -> str:
-        return "beta"
+        return "v0"
 
     @property
     def num_players(self) -> int: