I need help with a problem.
I'm learning Laravel 5. And I've found a problem trying to do something.
I tried to install Laravel Collection. I go to composer.json and I add this line on require:
But when I execute composer update on shell, I have an error: Your requirements could not be resolved to an installable set of packages. And a lot of posibles conclusions to the problem.
I put a screenshot to help you to understand.
I hope you can help me.