chore(deps): bump appium-xcode from 5.2.6 to 5.2.7

Bumps [appium-xcode](https://github.com/appium/appium-xcode) from 5.2.6 to 5.2.7.
- [Release notes](https://github.com/appium/appium-xcode/releases)
- [Changelog](https://github.com/appium/appium-xcode/blob/master/CHANGELOG.md)
- [Commits](appium/appium-xcode@v5.2.6...v5.2.7)

---
updated-dependencies:
- dependency-name: appium-xcode
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>