Bump to v1.2.2 (#237)

Author: rodrigodelazcano

setup.py

@@ -26,7 +26,7 @@
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
     ],
-    version="1.2.1",
+    version="1.2.2",
     keywords="memory, environment, agent, rl, gym",
     url="https://github.com/Farama-Foundation/gym-minigrid",
     description="Minimalistic gridworld reinforcement learning environments",