[General] Consider SymfonyBundleDependencies

[craigh]

possible solution to the sub-dependency problem.

https://github.com/mmoreram/symfony-bundle-dependencies

@cmfcmf @Guite

[craigh]

https://blog.fervo.se/blog/2016/02/07/bundle-deps/

http://mmoreram.com/blog/2016/02/09/you-probably-need-bundle-dependencies/

[craigh]

The library references in the OP is now Symfony 3.2+ and php 7.1+ which puts it outside our version requirements so moving this to 2.1.0 only as a reference. perhaps we can use the OP bundle rec and a guide for creating something like this on our own either in 2.1.0 or later using this in 3.0.0

[craigh]

https://medium.com/@fabpot/fabien-potencier-4574622d6a7e