v1.0.1

This version changes a few things from v1.0.0, namely:

• Add a configurable timeout property to the API class, which is used when doing a request with fetch() (so on every request) (#32)
• Make API.createAsync() always throw an APIError (instead of sometimes)
• Add original_error to APIError, which is the error that has caused the program to throw an APIError (if there is one)
• Add status_code to APIError, which is the status code given by the server (if there is one)

And also:

• APIError's parameters property is no longer marked as optional
• A Beatmapset's source may no longer be a number (it'll now always be a string, as written in the interface)

Full Changelog: v1.0.0...v1.0.1