* accept and extend base url

* Update index.js

* Add specific Node versions

* Don't use object destructuring assignment syntax

For compatibility with Node 6

* Typo

* Object merge no longer needed

* Definitely not ready for v1

* Drop callback support

* Fix linting issues

* Use encodeURIComponent

* Use native promises

* Remove remaining artifact from callbacks

* Remove callback-related docs

* Simplify constructor

* WHATWG URL parser not available for Node 6

* Minor cleanup

* Bring library into the 21st century

* Remove unused/unneeded args

* I feel like we could have just skipped to this part

* These things can no longer be tested