Use browserslist to infer ES version to check against

[jroru]

Requested Update

It would be great if a browserslist config could be used to infer which ES version to check against

Related issue: obahareth/are-you-es5#64

Why Is This Update Needed?

Many front-end tools (e.g. babel) use the common browserslist configuration to determine which browsers to target. Before I ship my code to production, I would like to verify that the transpiled code indeed supports the ES version inferred by my supported browsers list.

Are There Examples Of This Requested Update Elsewhere?

No

Read about references issues here. Provide paragraph text responses to each header.

[yowainwright]

If anyone wants to submit this PR, I'm definitely open to it! 👍

However, I (the maintainer/creator) is more focused on providing warning checks based on versions.
AKA, Map in es6, etc

Thanks for this issue @jroru ! Sorry it took me so long to respond!