Run tests on multiple python versions in CircleCI

.circleci/config.yml

@@ -3,12 +3,18 @@
 # Check https://circleci.com/docs/2.0/language-python/ for more details
 #
 version: 2
+workflows:
+  version: 2
+  test:
+    jobs:
+      - test-3.5
+      - test-3.6
+      - test-3.7
+
 jobs:
-  build:
+  test-3.5: &test-template
     docker:
-      # specify the version you desire here
+      - image: circleci/python:3.5.6
-      # use `-browsers` prefix for selenium tests, e.g. `3.6.1-browsers`
-      - image: circleci/python:3.6.6
       
     working_directory: ~/repo
 
@@ -18,7 +24,8 @@ jobs:
       - run:
           name: install dependencies
           command: |
-            sudo apt-get update && sudo apt-get install -y python3-pip python3-flask python3-stem python3-pyqt5 python3-cryptography python3-crypto python3-nacl python3-socks python3-stdeb python3-all python-nautilus xvfb obfs4proxy
+            sudo apt-get update
+            sudo apt-get install -y python3-pip python3-flask python3-stem python3-pyqt5 python3-crypto python3-socks python3-stdeb python3-all python-nautilus xvfb obfs4proxy
             sudo pip3 install -r install/requirements.txt
             sudo pip3 install -r install/requirements-tests.txt
             sudo pip3 install pytest-cov flake8
@@ -37,3 +44,12 @@ jobs:
           command: |
             xvfb-run pytest --cov=onionshare --cov=onionshare_gui --cov-report=term-missing -vvv tests/
 
+  test-3.6:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.6.6
+
+  test-3.7:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.7.1