Fix travis.yml

.travis.yml

@@ -1,16 +1,18 @@
 language: python
+dist: trusty
+sudo: required
+group: edge
 python:
   - "3.6"
 env:
   - DJANGO_VERSION=2.0
-  global:
   - CC_TEST_REPORTER_ID=6c015c866a94cfb5b7a046e9a0725a6a02224b1023eeef9ea2db63426beb3fd3
 install:
   - pip install Django==$DJANGO_VERSION
   - pip install tox-travis
   - pip install -q -r requirements-dev.txt
   - pip install coverage
-before_script:  # code coverage tool
+before_script:
   - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
   - chmod +x ./cc-test-reporter
   - ./cc-test-reporter before-build