*Contains breaking changes*
To better the library, it has been reverted back to its original single-class form and backwards compatibile with 1.x.x
* GraphQL and REST are all under one class
* `getApiCalls()` now takes two arguments, first being rest|graph, second being the key
* `rest()` is now for REST calls
* `graph()` is now for GraphQL calls
* `request()` is aliased to `rest()` for backward compatibility