Add test CI (include circuits first)

[okwme]

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tests broke after #56 and didn't get caught cause we're not using any CI. Would be cool to have a minimal integration but I'm not sure how long it would take to run since it includes circom compilation. Should be relatively short since we don't use any big circuits in tests... actually that's not true, the contracts require the big circuits to have been built..... makes me think it will be time soon to include the built circuits in the distribution. Right now they're manually moved from anybody-problem to the front end, probably we should be saving them in anybody-problem like the compiled contracts