Subject: [quicwg/base-drafts] 1b3b1e: CircleCI configuration update

From: Martin Thomson <[email-masked]>
Date: Mon, 05 Jul 2021 23:36:33 -0700

Branch: refs/heads/circle-is-busted
  Home:   https://github.com/quicwg/base-drafts
  Commit: 1b3b1e1c69a4d697c58cfa78bc463968b564afa9
      https://github.com/quicwg/base-drafts/commit/1b3b1e1c69a4d697c58cfa78bc463968b564afa9
  Author: Martin Thomson <[email-masked]>
  Date:   2021-07-06 (Tue, 06 Jul 2021)

  Changed paths:
    M .circleci/config.yml

  Log Message:
  -----------
  CircleCI configuration update

I've had to make some changes in the template to deal with some odd
regressions in CircleCI (see
https://github.com/martinthomson/i-d-template/issues/293 for details).
This is the updated configuration.