Benchmarks don't run with newer versions of dependencies

[flip111]

The original benchotron is not being updated it seems https://github.com/hdgarrood/purescript-benchotron

A fork was made https://github.com/PureFunctor/purescript-benchotron

Both versions rely on an older release of node-readline. This commit causes incompatibilities with newer versions of that library https://github.com/purescript-node/purescript-node-readline/pull/34/files