Add to dasl-testing

Hello, has py-cid been tested against the dasl-testing suite? If not I recommend adding it. It will check for conformance to specs, and also get this project listed more publicly.

Test suite: https://github.com/hyphacoop/dasl-testing
Results website: https://hyphacoop.github.io/dasl-testing/

cc @makew0rld, maintainer of dasl-testing

Start by reviewing the dasl-testing suite and its results website to understand how projects are added and how conformance is checked. Determine the entry point for testing py-cid, then run the suite against this project. Done means py-cid is tested successfully and appears on the published results site.

Written by the indexing model from the issue text.