Revert "chore(package.json): "require" node 5+ to build" (#180)
Revert "chore(package.json): "require" node 5+ to build" (#180)

This reverts commit c16490cc7eb20feff808e7112ece66199a5d3536.
mrdannael/react-tags,mrdannael/react-tags,prakhar1989/react-tags,prakhar1989/react-tags,prakhar1989/react-tags,cklab/react-tags,cklab/react-tags