[w3c/webauthn] 84187c: Use pip feature: 2020-resolver

From: Emil Lundberg <noreply@github.com> Date: Wed, 05 May 2021 03:46:18 -0700 To: public-webauthn@w3.org Message-ID: <w3c/webauthn/push/refs/heads/travis-bikeshed-pip/91786a-84187c@github.com> · This archive was generated by hypermail 2.4.0 : Tuesday, 5 July 2022 07:26:43 UTC

  Branch: refs/heads/travis-bikeshed-pip
  Home:   https://github.com/w3c/webauthn
  Commit: 84187cd8da1268c65e83de9cc13a3638f5877312
      https://github.com/w3c/webauthn/commit/84187cd8da1268c65e83de9cc13a3638f5877312
  Author: Emil Lundberg <emil@yubico.com>
  Date:   2021-05-05 (Wed, 05 May 2021)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Use pip feature: 2020-resolver

As was recommended by pip on my local machine:

```
ERROR: After October 2020 you may experience errors when installing or updating packages. This is because pip will change the way that it resolves dependency conflicts.
We recommend you use --use-feature=2020-resolver to test your packages with the new resolver before it becomes the default.
```