title: composer require (normal) and require --dev in one single CLI command
body: <p>How can I use <code>composer require vendor/normal_package</code> and <code>composer require vendor/dev_package --dev</code> in one single command? I want one CLI command that requires 2 packages, one into "normal" <code>require</code> and one into <code>require-dev</code> section.</p>
  
  <p>Background info: I've a composer.json file like this:</p>
  
  <pre><code>{
      "require": {
          "drupal/core": "^8.6.7"
      },
      "require-dev": {
          "webflo/drupal-core-require-dev": "^8.6.7"
      }
  }
  </code></pre>
  
  <p>Those two packages always need to be updated the same time. Usually I just do a <code>composer update drupal/core webflo/drupal-core-require-dev --with-dependencies</code> which works fine.</p>
  
  <p>But sometimes I explicitly want to require a new minimum version, and I want to do it in a shell script in order to update multiple projects at once (no manual editing of <code>composer.json</code>). I can't run the two commands<br>
  <code>composer require drupal/core:^8.6.10 
  composer require webflo/drupal-core-require-dev:^8.6.10</code><br>
  consecutively, because they depend on each other.</p>
  
  <p>How can I require a normal and a dev package in one single command?</p>