title: how to update warn deprecated
body: <p>I'm trying to learn node and npm, using express for a little project.
  When i install it, i got</p>
  
  <pre><code>npm WARN deprecated core-js@2.6.10: core-js@&lt;3.0 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
  </code></pre>
  
  <p>I understood that if everything works, it's not necessary to update everything, but i'm trying to learn and go the extra, unnecessary, mile.</p>
  
  <p>How can i update only core-js?</p>
  
  <pre><code>npm install core-js@^3
  </code></pre>
  
  <p>will update it adding it to the dependencies in package.json.</p>
  
  <p>Is this the right way to do it?
  Or it's better to update the parent package that use it? If so, how can i understand which is the package that need an update and how to update it?
  Or is there a way to update only the modules listed in package-lock.json.</p>
  
  <p>Thanks.</p>