Report on CSS v4.0.1

[michielbdejong]

CSS is currently passing all CRUD and WAC tests, except:

• because the SOLID and CRUD tests rely on the live solidcommunity.net server which has a bug, you need to run CSS with:
  • git checkout v4.0.1
  • npm ci
  • comment out line 16 of node_modules/@solid/access-token-verifier/dist/algorithm/verifySolidAccessTokenIssuer.js
  • npm start
• the concurrency tests fail (these test an optional feature, not required by Solid v0.9), so run the CRUD tests with SKIP_CONC=1
• some of the WAC tests for Create fail, see Investigate 4 CSS v4.0.1 failures in create.test.ts web-access-control-tests#51

I'm opening this PR to discuss these new test results before publishing them on solidservers.org
Will wait at least 14 days, so this PR will be merged on or after 27 June.