message: Automatically update package-lock.json for Greenkeeper PRs.
diff: @@ -9,3 +9,9 @@ node_js:
  # Allow Travis tests to run in containers.
  sudo: false
  +
  +# Update package-lock.json after test runs:
  +before_install:
  + - npm install -g npm@latest greenkeeper-lockfile@1
  +before_script: greenkeeper-lockfile-update
  +after_script: greenkeeper-lockfile-upload
  