Rector Prefixer

This tool builds prefixed Rector.

When you run composer require rector/rector and fail on PHP code API conflicts - e.g. you use Symfony 2.8, but Rector requires 3.4.
If you need PHP 7.0 and bellow, use Rector in the Docker.

Compile Prefixed `rector.phar`

composer install
bin/console compile

# prefixing and compiling to rector.phar, might take 2-3 mins

# final file
tmp/rector.phar