update to latest cfg library with better higher guidance

Author: lucidrains

setup.py

@@ -3,7 +3,7 @@
 setup(
   name = 'robotic-transformer-pytorch',
   packages = find_packages(exclude=[]),
-  version = '0.2.2',
+  version = '0.2.3',
   license='MIT',
   description = 'Robotic Transformer - Pytorch',
   author = 'Phil Wang',
@@ -18,7 +18,7 @@
     'robotics'
   ],
   install_requires=[
-    'classifier-free-guidance-pytorch>=0.4.0',
+    'classifier-free-guidance-pytorch>=0.7.1',
     'einops>=0.8',
     'torch>=2.0',
   ],