New Configuration Options, Use OJ for serialization / deserialization

[rrcobb]

Pr is very messy right now, started it in an internal hackathon - mostly leaving here for comment / so I stop ignoring it. Before something like this merges, it should

1. be split into multiple prs
2. be cleaned of dumb editor changes (" to ' is my vim config, but is not actually a good change)
3. be reviewed for design / features

Features added:

• configure more about the way the snapshot is saved (configurable path, configurable extension)
• read an env var to decide whether to save new snapshots or fail on a mismatch
• load a snapshot from a name, (nominally, for use in other tests as a mock object, but I guess you could use it for other things too!)

[yesmeck]

Hello @rrcobb , can you check the serializer branch? I've tried add a snapshot_serializer config and introduce awesome_print as a default serializer.

[rrcobb]

Nice, I'll take a look at that branch and see whether I can just close this one. It could be there are small pieces of this that are worth pulling out, like making oj an optional serializer, taking a snapshot to a particular file, etc

[timoschilling]

I like this PR, please continue your work.

[levinmr]

Some of this has been integrated into version 2.0.0. Up to you if you want to rebase and work out the conflicts for the remainder

[sonarqubecloud[bot]]

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