Contributing to open source bundles from vendor directory?

Question

Ideal Situation

Often while working on a Symfony2 project I will spot something I want to change in one of my dependencies. If I could find a way to

Answer 1

As of 2017 the proper way to do it is:

1. Add your GitHub branch link to the repositories

   "repositories": [
       {
           "type": "vcs",
           "url": "https://github.com/crimson-med/yii2-link-preview"
       }
   ],
   

2. Add the source to the require of your composer.json

   "require": {
       "yii2mod/yii2-link-preview": "dev-master"
   },