Merge pull request #124 from willingc/fix-attrs

Fix attrs/jsonschema breakage

Author: mbmilligan

.travis.yml

@@ -3,7 +3,7 @@ language: python
 sudo: false
 python:
     - 3.7-dev
-    - 3.6
+    - 3.6.6
     - 3.5
     - 3.4
 env:
@@ -22,20 +22,14 @@ matrix:
 
 before_install:
     - npm install -g configurable-http-proxy
-    - git clone --quiet --depth 1 https://github.com/minrk/travis-wheels travis-wheels
     - git clone --quiet --branch $JHUB_VER https://github.com/jupyter/jupyterhub.git jupyterhub
+    - pip install --upgrade pip
 install:
 # Don't let requirements pull in tornado 5 yet except for jupyterhub master
     - if [ $JHUB_VER != "master" -a $JHUB_VER != "0.9.1" ]; then pip install "tornado<5.0"; fi
-    - pip install jsonschema!=3.0.0a1   # issue #110, remove later
-    - pip install --pre -f travis-wheels/wheelhouse -r jupyterhub/dev-requirements.txt
+    - pip install attrs>17.4.0
+    - pip install --pre -r jupyterhub/dev-requirements.txt
     - pip install --pre -e jupyterhub
 
 script:
     - travis_retry py.test --lf --cov batchspawner batchspawner/tests -v
-#after_success:
-#    - codecov
-# matrix:
-#   include:
-#     - python: 3.5
-#       env: JUPYTERHUB_TEST_SUBDOMAIN_HOST=http://127.0.0.1.xip.io:8000