* Add half-finished rest api changes
* Add basic, messy changes to rest api
* Fix expect() in ApiRequest
* Remove ApiRequest, add route for beacon state
* Tidy rest api, add get state from root
* Add api method for getting state roots by slot
* Add test for URL helper
* Simplify state_at_slot fn
* Add tests for rest api helper fns
* Add extra tests for parse root
* Fix clippy lints
* Fix compile error in rest api
* Update test to new ethereum-types
