added some shit, fixed some shit

What's Changed

• detect and report outliers (#6) by @candrewlee14 in https://github.com/andrewrk/poop/pull/16
• add 95% confidence interval to delta by @candrewlee14 in https://github.com/andrewrk/poop/pull/18
• Show progress while running commands by @mlugg in https://github.com/andrewrk/poop/pull/20

New Contributors

• @candrewlee14 made their first contribution in https://github.com/andrewrk/poop/pull/16
• @mlugg made their first contribution in https://github.com/andrewrk/poop/pull/20

Full Changelog: https://github.com/andrewrk/poop/compare/0.2.0...0.3.0