refs https://github.com/TryGhost/Toolbox/issues/152
refs 5bea089dfe
refs 16ad5f73c4
- The refactor is heavily inspired by the referenced commit from @ErisDS
- This refactor is meant to serve as a template for further refactors and unification of the abstraction over "request". Should allow us to be more agnostic towards the library that's powering the request thing. For example, mock-express style of request handling could substitute or get substututed easily if all tests are behind similar "get(Authenticated)Agent" interface