Set up Echidna for auto-publication of DID Spec Registries

Now that this document has been published:

https://www.w3.org/TR/did-spec-registries/

We should set up Echidna so that the latest version can be
auto-published. There is a tracking issue to make sure that happens
sooner than later.

https://github.com/w3c/did-spec-registries/issues/68

This is a request to the DID WG Chairs to explore a straw poll for next
Tuesday's call to get this administrative item under way.

-- manu

-- 
Manu Sporny - https://www.linkedin.com/in/manusporny/
Founder/CEO - Digital Bazaar, Inc.
blog: Veres One Decentralized Identifier Blockchain Launches
https://tinyurl.com/veres-one-launches