Build Cache for Xcode v0.13.6

Changelog
1

What’s Changed

  • Bump bitrise-build-cache-cli to v2.8.4. Includes a config-cache key fix — / in git branch names is now sanitized when building config-cache keys, with Xcode fallback-key parity coverage (cli#353).
  • Also picks up intervening CLI versions v2.8.2–v2.8.3 (release-infrastructure changes only — no Xcode-side behavior changes).