Make snapshots

[hannaofsweden]

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Is this a bug report or a feature request?

Feature request.

Description

Currently, snapshots are one line each in a single file.

That makes it so you can't see what has changed in a Git diff, since Git is line-based.

Idea:

Make snapshots javascript objects instead so that a Git diff will show exactly what has changed. Make this a configurable option that you can set for all tests.

It might also be useful to allow using a single snapshot file per test file so that you can see by the list of changed snapshot files what has changed.

[bmaupin]

This looks like a duplicate of #18