v0.7.0

Changed

• The suite signs its delegation proofs with eddsa-jcs-2022 instead of
  Ed25519Signature2020. That is what current WAS clients emit, so the required
  tests now exercise the cryptosuite a server actually meets. A server that
  verifies only Ed25519Signature2020 fails the delegated tests until it
  accepts both; was-teaching-server does so from 0.23.0.

Added

• A delegation-cryptosuites suite: a server accepts a delegation proof signed
  with eddsa-jcs-2022, one signed with Ed25519Signature2020, and a chain
  whose links mix the two -- rather than the run silently tracking whichever
  suite it happens to send. Only the eddsa-jcs-2022 test is required, matching
  what the rest of the suite signs with. The two tests involving
  Ed25519Signature2020 are optional: a server may reasonably have moved past
  it, and the spec's authorization profile names no cryptosuite either way.
• Actor.signer on the test identities, so a suite can build a client of its
  own -- one signing with a different cryptosuite, for instance -- without
  reaching into rootClient.

Fixed

• The README's suite-id table lists all 20 suites; it had been missing seven
  added since it was written.