[BugFix] Fix setuptools install version (#380)

* [BugFix] Fix deprecated setuptools test command

* Fix pytest ini

* Undo all changes

* Install specific version of setuptools

.travis.yml

@@ -8,7 +8,7 @@ install:
 - pip install coverage
 - pip install flake8 pytest PyYAML
 - pip install coveralls
-- pip install setuptools --upgrade
+- pip install setuptools==70.0.0
 script:
 - flake8 ./ || travis_terminate 1;
 - python setup.py test || travis_terminate 1;