title: Composer - Is it possible to install packages in "require-dev" globally with one command?
body: <p>quick question, and please let me know if anything about my idea is silly in general / if there is a better approach to this: </p>
  
  <p>For the purpose of creating a Continuous Delivery pipeline, I would like to declare some packages needed for various types of tests in Composer with "require-dev". However, I am wondering if it was possible to run the install command in a way that it would install all packages listed under "require-dev" globally with one command? </p>
  
  <p>It would be nice, since it would allow me to keep the test environments up-to-date with ease and allow for global access of all PHP Testing solutions I need. I know it is not much work and I would already be done with it if I just went through all of them manually, but I was curious to know if there was a nice way of doing this, since I think downloading and everything by hand, giving it execution rights and then moving it to the bin/ directory for global access is kind of a tedious solution.</p>