Unnecessary coupling with silverstripe/framework

[GuySartorelli]

silverstripe/config got coupled to silverstripe/framework in https://github.com/silverstripe/silverstripe-config/pull/73

This coupling makes it impossible to use this config API without including all of framework as a dependency - which just isn't necessary.

I've recently started working on a PHP project where I'd like to use this configuration API, but I don't want all of framework in there.

PRs

• https://github.com/silverstripe/silverstripe-config/pull/82
• https://github.com/silverstripe/gha-generate-matrix/pull/52