Is core-js necessary?

[bvisness]

I was looking at the bundlephobia for this library and found that about half of the footprint is core-js. But I can't find a single reference to core-js anywhere in the source code. Is it necessary?

[avindra]

I think this was related to babel-runtime being included, which I removed in this pr #121

You should be able to close this issue if / after react-component/util#76 gets merged and another release goes out for rc-drawer