v3.1.0

• New rule: no-fx (Ed Sanders)
• New rule: no-done-fail (Ed Sanders)
• Rule fix: Add stop and finish methods to no-animate (Ed Sanders)
• Rule fix: no-extend: Only fix if first arg is object literal (Ed Sanders)

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• Code: Fix some indentation in utils (Ed Sanders)
• Code: Migrate GitHub Actions from v1 to v4 to avoid warnings (James D. Forrester)
• Code: Code cleanup in tests (Ed Sanders)
• Code: Fix typos in utils documentation (Ed Sanders)
• Code: Upgrade eslint-config-wikimedia from 0.28.0 to 0.28.2 (James D. Forrester)
• Release: Provide a .mailmap for consistency in git logs (James D. Forrester)