 Fix timeout, timeoutOnce, networkError, networkErrorOnce TS typedefs 
 Fix timeout, timeoutOnce, networkError, networkErrorOnce TS typedefs 

... so they are more aligned with [reality](https://github.com/ctimmerm/axios-mock-adapter/blob/8681af9c8375be4c5dc798f68a90154b5552cadd/src/index.js)
ctimmerm/axios-mock-adapter,ctimmerm/axios-mock-adapter