v2.3.1

Fixed

• Add dist folder to list of Flow ignores, so Flow doesn’t error after a build.
• Issue with babel helpers. Just reverted commit 6f9f2c3 for now.

Changed

• Removed a couple of old npm scripts from the days before we introduced rollup to the build
  pipeline.
• Upgraded a bunch of devDependencies, including Webpack which required a bit of a config refactor.