upgrade rlcard version again (changes to its dependencies only)

Author: jkterry1

setup.py

@@ -25,7 +25,7 @@ def get_version():
 
 extras = {
     "atari": ["multi_agent_ale_py==0.1.10", "pygame==2.0.0"],
-    "classic": ["python-chess==0.31.4", "rlcard==0.2.7", "hanabi_learning_environment==0.0.1"],
+    "classic": ["python-chess==0.31.4", "rlcard==0.2.8", "hanabi_learning_environment==0.0.1"],
     "butterfly": ["pygame==2.0.0", "pymunk==5.7.0"],
     "magent": ["magent==0.1.13"],
     "mpe": [],