Target current node version in .babelrc

[gauravtiwari]

Fixes #35

Reference - https://github.com/babel/babel-preset-env#usebuiltins-boolean

[RavenXce]

I just realized .babelrc was updated here. This will break stuff as useBuiltIns requires babel-polyfill so we need to add it to the yarn setup.

See instructions here: https://github.com/babel/babel-preset-env#usebuiltins

I also think the default target should be something sane and safe like "browsers": "> 1%". Targeting the latest node version doesn't make sense in a front-end web context as the supported feature set between browsers and nodejs can vary quite a lot. Supporting 99% of browsers by default should just work™ for most users which I think is what we want here.

[gauravtiwari]

@RavenXce Oops. Wanna make a quick PR please?

[RavenXce]

Sure. Linking the other conversation here so we have some context: #306 (comment)

[gauravtiwari]

Cool thanks 👍