v2.0.0 release

The following changes are important to keep in mind when upgrading from
@mapcreator/maps4news to @mapcreator/api.

• JobMonitor, JobMonitorRow and JobMonitorFilter classes have been removed
• PaginatedResourceWrapper and ResourceCache classes have been removed
  • This also removes the PaginatedResourceListing::wrap and SimpleResourceProxy::listAndWrap methods
• Maps4News class has been renamed to Mapcreator
• Most methods that return Promises can now be canceled using the CancelablePromise type
• axios has been deprecated in favor of ky. This means that calls like api.axios.get() need to be rewritten