title: is it possible to tell dependabot to not connect to central maven at all
body: <p>In enterprise environment, the connection to central maven could be blocked. In this case,
  i) either don't connect to central maven at all
  ii) or if the connection to central maven is not successful, don't raise exception, just move on to other repositories</p>
  <p>currently i see below exception</p>
  <pre><code>/vendor/ruby/2.6.0/gems/excon-0.76.0/lib/excon/socket.rb:285:in `select_with_timeout': connect_write timeout reached (Excon::Error::Timeout)
  </code></pre>
  <p>so I am wondering if there is any way to tell dependabot to not try connecting to maven central at all.</p>
  <p>fyi. i am running <a href="https://github.com/dependabot/dependabot-script" rel="nofollow noreferrer">https://github.com/dependabot/dependabot-script</a></p>