refs TryGhost/Toolbox#158
refs TryGhost/Toolbox#129 (comment)
We now have @tryghost/jest-snapshot - a suite of utilities for using snapshots with mocha, should, etc
The @tryghost/express-test lib also uses it to provide chained snapshot assertions
This library was created because all the existing implementations I could find, including the in use @ethanresnick/chai-jest-snapshot
didn't properly support property matching. @ethanresnick/chai-jest-snapshot supposedly supported it, but the implementation was incorrect
and frequently lead to false test passes.
This library also has (after some back and forth) path resolution so that snapshots can live in a local __snapshots__ folder
