[w3c/webauthn] b7ac18: Update web-platform-tests URLs (#947)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: b7ac1867e94d6adb2c0a582f34bf21e42e8daaf4
      https://github.com/w3c/webauthn/commit/b7ac1867e94d6adb2c0a582f34bf21e42e8daaf4
  Author: Philip Jägenstedt <philip@foolip.org>
  Date:   2018-06-13 (Wed, 13 Jun 2018)

  Changed paths:
    M README.md
    M index.bs

  Log Message:
  -----------
  Update web-platform-tests URLs (#947)



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