* Optimise namespaces with default exports ([#314](https://github.com/rollup/rollup/issues/314))
## 0.21.0
* Only include statements whose side-effects are relevant (i.e. contribute to exports or affect global state) ([#253](https://github.com/rollup/rollup/pull/253)) ([#253](https://github.com/rollup/rollup/pull/253))