title: How can one define an array type variable in gitlab-ci
body: <p>I'm writing a gitlab-ci.yaml script for my pipeline, and trying to define an array of strings variable (simplified version of the code):</p>
  
  <pre><code>npm_audit:
    variables:
      PACKAGE-WHITE-LIST: ["package A", "package B"]
    script:
     - npm install audit-ci
     - npx audit-ci -w PACKAGE-WHITE-LIST npm &gt;&gt; audit.log
  </code></pre>
  
  <p>When I run the pipeline, I get a yaml parse failure:
  "variables config should be a hash of key value pairs array"</p>
  
  <p>What am I missing here?</p>