make it test against accelerate master branch

Author: piEsposito

setup.py

@@ -178,7 +178,7 @@ def run(self):
 extras["docs"] = deps_list("hf-doc-builder")
 extras["training"] = deps_list("accelerate", "datasets", "tensorboard", "modelcards")
 extras["test"] = deps_list(
-    "accelerate",
+    "git://github.com/huggingface/accelerate.git",
     "datasets",
     "onnxruntime",
     "pytest",