Fix #151: extraneous dependencies in npm package
Fix #151: extraneous dependencies in npm package

npm3 has a bug with shrinkwrap files that causes it to include dev
dependencies: https://github.com/npm/npm/issues/9727. Since we have so
few dependencies, there's probably no need for shrinkwrapping anyways.


harc/ohm,harc/ohm,cdglabs/ohm,cdglabs/ohm,cdglabs/ohm,harc/ohm