do not have same dependency in dependencies and peerDependencies

[vvakame]

detail npm/npm#6506 (comment)

[IgorMinar]

I sent a PR for this. The reason why fixing this is important is that npm fails and complains about this package.json when shrinkwrapping a project that uses minitable directly or as a transitive dependency.

So any project that depends on minitable directly or transitively needs to manually tweak the minitable package.json during each npm upgrade and re-shrinkwrap.

Since tsd (typescript type definition manager) depends on minitable, any typescript + npm project that shrinkwraps dependencies is affected.

Please merge #3 and cut a new version so that we can get tsd to update.