CI runs tests for multiple python version

.gitlab-ci.yml

-before_script:
-  - source activate tango2.7
-  - conda install cffi
 
-tests:
+test2.7:
   stage: test
-  script: python setup.py test
+  script:
+    - conda create -n p27 python=2.7 cffi numpy
+    - source activate p27
+    - python setup.py test
+
+
+test3.6:
+  stage: test
+  script:
+    - conda create -n p36 python=3.6 cffi numpy
+    - source activate p36
+    - python setup.py test
   artifacts:
     paths:
       - htmlcov/
     expire_in: 7 days
 
+
 pages:
   stage: deploy
   script:

setup.py

@@ -11,7 +11,7 @@ setup(
     version='0.1.0.dev0',
 
     packages=['handel'],
-    install_requires=['cffi'],
+    install_requires=['cffi', 'numpy'],
     setup_requires=['pytest-runner', 'pytest'] if TESTING else [],
     tests_require=['pytest-cov', 'mock'],