unused async await

[MathieuDerelle]

I had a "ReferenceError: regeneratorRuntime is not defined" when using your package because I had to add it to my list of transpiled npm packages

I looked a bit at your code and the async await statement doesn't do anything
since there is no await airbrakeNotify

redux-airbrake/src/index.js

Line 36 in bcbbfe4

airbrakeNotify({ error, params });