After upgrading tox, packaging works again

setup.py

@@ -44,7 +44,7 @@ setup(name='jedi',
               'colorama',
           ],
       },
-      package_data={'jedi': ['third_party']},
+      package_data={'jedi': ['*.pyi']},
       platforms=['any'],
       classifiers=[
           'Development Status :: 4 - Beta',

tox.ini

@@ -25,7 +25,6 @@ setenv =
     env37: JEDI_TEST_ENVIRONMENT=37
 commands =
     pytest {posargs}
-whitelist_externals = pytest
 [testenv:cov]
 commands =
     coverage run --source jedi -m pytest