SyntaxError: Unexpected identifier on `forbidExtraProps` from `prop-types-exact`

[Pedro Palau]

Hello, good work with this repo.
I'm getting this error when testing with Jest, also the same error ocurr with TypeScript.

.../airbnb-prop-types/src/forbidExtraProps.js:1 (function (exports, require, module, __filename, __dirname) { import forbidExtraProps from 'prop-types-exact'; ^^^^^^^^^^^^^^^^ SyntaxError: Unexpected identifier

I'm using Babel 7.

[Jordan Harband]

Duplicate of #52.