Revert "Tidy up rollup config (#2781)" (#2794)
Revert "Tidy up rollup config (#2781)" (#2794)

This reverts commit f13be4e69bfacbc2fc6c3b60751256f3d44a1f85.
JedWatson/react-select,JedWatson/react-select,submittable/react-select,mmpro/react-select