gha updates

.github/workflows/tests.yml

@@ -39,6 +39,9 @@ jobs:
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
 
+    - name: Clear pip cache to save disk space
+      run: pip cache purge
+
     # Run tests with tox
     - name: Test with tox
       run: tox

setup.py

@@ -61,9 +61,9 @@
     "autodocsumm>=0.1.10",
     # style check
     "flake8>=3.7.7",
-    "isort>=4.3.4",
+    # "isort>=4.3.4",
     # fix style issues
-    "autoflake>=1.2",
+    # "autoflake>=1.2",
     "autopep8>=1.4.3",
     # distribute on PyPI
     "twine>=1.10.0",