Fix CLI script in Travis future job

Currently failing because of: ``pkg_resources.ContextualVersionConflict: (neo 0.8.0.dev0 (/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages), Requirement.parse('neo<0.8.0,>=0.7.1'), {'elephant'})``.

After removing ``__requires__ = 'neurotic'`` from the CLI script, ``pkg_resources`` will no longer check for conflicts.

.travis.yml

@@ -25,6 +25,13 @@ matrix:
                   git+https://github.com/NeuralEnsemble/elephant.git \
                   git+https://github.com/NeuralEnsemble/ephyviewer.git
 
+              # prevent CLI script from failing due to conflicting dependency versions
+              - which neurotic
+              - ls -l /home/travis/miniconda/envs/test-environment/bin
+              - cat /home/travis/miniconda/envs/test-environment/bin/neurotic-script.py
+              - sed -i "/__requires__ = 'neurotic'/d" /home/travis/miniconda/envs/test-environment/bin/neurotic-script.py
+              - cat /home/travis/miniconda/envs/test-environment/bin/neurotic-script.py
+
               # list versions
               - python --version
               - python -c "import os, sys; assert sys.version_info[:2] == tuple(map(int, os.environ['TRAVIS_PYTHON_VERSION'].split('.')))[:2]"