TASK: Avoid composer output during package creation
TASK: Avoid composer output during package creation

When a new package is created internally composer is used to require it immediately. During that composer outputs content to the console which is often confusing.
The change passes a NullOutput to composer to avoid this behavior.

kdambekalns/flow-development-collection,neos/flow-development-collection,neos/flow-development-collection,neos/flow-development-collection,robertlemke/flow-development-collection,fcool/flow-development-collection,fcool/flow-development-collection,robertlemke/flow-development-collection,robertlemke/flow-development-collection,kdambekalns/flow-development-collection,daniellienert/flow-development-collection,fcool/flow-development-collection,daniellienert/flow-development-collection,daniellienert/flow-development-collection,kdambekalns/flow-development-collection,robertlemke/flow-development-collection,neos/flow-development-collection,kdambekalns/flow-development-collection,fcool/flow-development-collection