title: Nx CLI run many command is not working for multiple apps
body: <p>I have tried using Nx in an attempt to make use of Monorepos. I have been facing an issue to serve multiple apps via <code>nx run-many</code> command. Can anyone correct me if I'm doing something wrong?</p>
  <p>Command used: <code>nx run-many --target=serve --all</code></p>
  <p>I can see the Nx Console logging all the available apps but only running one</p>
  <pre><code>&gt;  NX  Running target serve for projects:
    - app1
    - app2
  ———————————————————————————————————————————————
  &gt; nx run app1:serve 
  </code></pre>