Some functions do not exit on completion

[ScreamingHawk]

I haven't done a complete pass but I noticed the following commands don't exit on completion. I have to kill the process.

npx circomkit setup <circuit>
npx circomkit prove <circuit> <input>
npx circomkit verify <circuit> <input>
npx circomkit contract <circuit>

compile, info and calldata all appear to return correctly.

[numtel]

That's probably due to this issue that we do this for on the tests. Maybe we should add this line inside each of those functions so it's not needed to be done externally?

https://github.com/erhant/circomkit/blob/48bc6b91bb288cee5859c1a854772fe8fa95585b/tests/hooks/teardown.js#L4

[erhant]

Closed with #96