title: Why Rails6+ started adding activesupport requires in config/environments/* by default?
body: <p>I'm a bit late with Rails version upgrade. What surprised me was a bunch of active_support requires in config/environment/* files generated by Rails.</p>
  <p>What are they for? Does it have something to do with Zeitwerk that was introduced in Rails6?
  I don't remember them being present in older versions of Rails.</p>
  <pre class="lang-none prettyprint-override"><code>ag ^require config/environments
  config/environments/development.rb
  1:require &quot;active_support/core_ext/integer/time&quot;
  
  config/environments/test.rb
  1:require &quot;active_support/core_ext/integer/time&quot;
  
  config/environments/production.rb
  1:require &quot;active_support/core_ext/integer/time&quot;
  </code></pre>
  <p>Steps to reproduce:</p>
  <pre class="lang-none prettyprint-override"><code>rails new myapp
  
  cat Gemfile  | grep &quot;^gem 'rails'&quot;
  gem 'rails', '~&gt; 6.1.3', '&gt;= 6.1.3.2'
  </code></pre>
  <p>I tried to find this update in rails/rails CHANGELOG and some git blaiming but that didn't help.</p>