Digital Token version 2.0.0

Breaking Changes

• dtif.org has moved to a paywall model requiring several thousand euros a year to access the full registry data. Fortunately they do maintain a publically available extract which is enough to support this library. However even that data is not accessible programmatically. Therefore the data is only updated when a maintainer downloads it manually. As a result, the data is tied to the package release which is not a good long time solution. Like the Localize solution, the next release of digital_token will generate an .etf file of the content we need and store in in R2.