Getting Travis to handle lock files.

.travis.yml

@@ -2,14 +2,20 @@ language: node_js
 node_js:
   - 'lts/*'
   - 'node'
+before_install:
+  # package-lock.json was introduced in npm@5
+  - '[[ $(node -v) =~ ^v9.*$ ]] || npm install -g npm@latest' # skipped when using node 9
+  - npm install -g greenkeeper-lockfile@1
 before_script:
   - npm install -g @adonisjs/cli
+  - greenkeeper-lockfile-update
   - 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
 after_script:
   - npm run coverage
   - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
+  - greenkeeper-lockfile-upload
 notifications:
     webhooks: https://www.travisbuddy.com/
     on_success: never