A package has been created to speed-up the development by symlinking packages. Install the package globally.
composer global require railken/composer-link
If this is your first global composer package, you have to add the composer path
export PATH=$PATH:$HOME/.composer/vendor/bin
Package:
composer-link link
composer-link unlink
Project:
composer-link link [vendor/mypackage]
composer-link unlink [vendor/mypackage]