title: start-server-and-test - Doesn't work with https for webpack-dev-server
body: <p>I am using create-react-app and I am running my development webpack server in https.
  So running npm run cypress:open, I would expect</p>
  
  <ol>
  <li>My application to run in <a href="https://localhost:3000" rel="noreferrer">https://localhost:3000</a></li>
  <li>Once the server is up, the cypress launcher to run on it.</li>
  </ol>
  
  <p>Only the first step happens, cypress launcher is not opening up.</p>
  
  <p>This is my scripts config in package.json.</p>
  
  <pre><code> "scripts": {
          "watch-css": "npm run build-css &amp;&amp; node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/ --watch --recursive",
          "start-js": "export HTTPS=true&amp;&amp;react-scripts start",
          "start": "npm-run-all -p watch-css start-js",
          "cy:open": "cypress open",
          "cypress:open": "start-server-and-test start http-get://localhost:3000 cy:open"
      }
  </code></pre>
  
  <p>I am facing this issue only for https, not http.</p>