@ikatyang thanks :)

The node 4 build failed. 🤔

It seems it's caused by @babel/code-frame, see 84a16d7.

Mmm, looks like https://github.com/babel/babel/blob/master/packages/babel-parser/src/plugin-utils.js#L59 =/

@ikatyang Nice, I was just looking at that 👍

Would it make sense to just bundle a polyfill for Array#includes so we don’t have to try to transform it?

I think transformation should be enough for now unless there're edge cases that we can't fix it easily.