title: Override jest-junit default output location?
body: <p>How can I override the default output directory and file name <a href="https://github.com/jest-community/jest-junit#readme" rel="noreferrer">jest-junit</a>?</p>
  
  <p>I would like to customise the output configuration of  output when using Jest, but it still ends up in the default location, i.e. <code>./junit.xml</code> in the project root folder. </p>
  
  <hr>
  
  <h3>My configuration</h3>
  
  <p>In <em>package.json</em>:</p>
  
  <pre><code>  "scripts": {
      "test": "jest --ci --reporters=default --reporters=jest-junit"
    },
    "devDependencies": {
      "jest": "^24.9.0",
      "jest-junit": "^10.0.0",
    }
  </code></pre>
  
  <p>In <em>jest.config.js</em></p>
  
  <pre><code>module.exports = {
    testMatch: [
      '**/*.spec.js',
    ],
    reporters: [
      'default',
      [ 'jest-junit', {
        outputDirectory: 'test_reports',
        outputName: 'jest-junit.xml',
      } ]
    ]
  };
  </code></pre>
  
  <h3>Expected result:</h3>
  
  <ul>
  <li>A file with the test result at <code>./test_reports/jest-junit.xml</code></li>
  </ul>
  
  <h3>Actual result:</h3>
  
  <ul>
  <li>A file with the test result at the default <code>./junit.xml</code></li>
  </ul>