Isobel Redelmeier

Results 3 issues of Isobel Redelmeier

We should centralize the config in a [config file](https://babeljs.io/docs/en/config-files).

From [this comment](https://github.com/lightstep/lightstep-tracer-javascript/blob/ad92c6eea604173f73cdc0b3d08800fd6a47f5e1/.eslintrc#L37) in #218. See [the rule](https://eslint.org/docs/rules/global-require) for more info.