[ci] simpler way to load correct version of isort

hat/tip @bramvanroy

.circleci/config.yml

@@ -85,8 +85,6 @@ jobs:
         parallelism: 1
         steps:
             - checkout
-            # we need a version of isort with https://github.com/timothycrosley/isort/pull/1000
-            - run: sudo pip install git+git://github.com/timothycrosley/isort.git@e63ae06ec7d70b06df9e528357650281a3d3ec22#egg=isort
             - run: sudo pip install .[tf,torch,quality]
             - run: black --check --line-length 119 --target-version py35 examples templates tests src utils
             - run: isort --check-only --recursive examples templates tests src utils

setup.py

@@ -73,11 +73,13 @@ extras["serving"] = ["pydantic", "uvicorn", "fastapi", "starlette"]
 extras["all"] = extras["serving"] + ["tensorflow", "torch"]
 
 extras["testing"] = ["pytest", "pytest-xdist"]
-extras["quality"] = ["black",
-                     "isort @ git+git://github.com/timothycrosley/isort.git@e63ae06ec7d70b06df9e528357650281a3d3ec22#egg=isort",
-                     "flake8"]
 extras["docs"] = ["recommonmark", "sphinx", "sphinx-markdown-tables", "sphinx-rtd-theme"]
 extras["dev"] = extras["testing"] + extras["quality"] + ["mecab-python3", "scikit-learn", "tensorflow", "torch"]
+extras["quality"] = [
+    "black",
+    "isort @ git+git://github.com/timothycrosley/isort.git@e63ae06ec7d70b06df9e528357650281a3d3ec22#egg=isort",
+    "flake8",
+]
 
 setup(
     name="transformers",