support python 3.7

.gitlab-ci.yml

@@ -57,4 +57,4 @@ test-py3.7:
   - make install
   - cd ..
   - pip3 install -r requirements.txt
-  - python3.7 -m pytest --cov rpg tests
\ No newline at end of file
+  - python3.7 -m pytest --cov rpg tests