title: Should jest/enzyme be a devDependency or dependency
body: <p>Should testing libraries being used in frontend like <code>jest</code>, <code>enzyme</code> or <code>react-testing-library</code> be part of <code>dependencies</code> or <code>devDependencies</code> in your <code>package.json</code>?</p>
  
  <p>Since testing is not part of your build compilation I think it should be in <code>devDependencies</code> but your testing suites run mostly in your pipelines while being deployed on server i.e, Jenkins, TravisCI etc. Which makes me wonder since it's being used in production shouldn't these be listed in <code>dependencies</code> section.</p>
  
  <p>Thank you for reading this question.</p>