Updates Xcodes from 1.6.0 to 1.7.0

[MattKiazyk]

Important: Do not tick a checkbox if you haven’t performed its action. Honesty is indispensable for a smooth review process.

In the following questions <cask> is the token of the cask you're submitting.

After making all changes to a cask, verify:

• [x] The submission is for a stable version or documented exception.
• [x] brew audit --cask --online <cask> is error-free.
• [x] brew style --fix <cask> reports no offenses.

Additionally, if adding a new cask:

• [ ] Named the cask according to the token reference.
• [ ] Checked the cask was not already refused.
• [ ] Checked the cask is submitted to the correct repo.
• [ ] brew audit --new-cask <cask> worked successfully.
• [ ] brew install --cask <cask> worked successfully.
• [ ] brew uninstall --cask <cask> worked successfully.

[BrewTestBot]

:robot: A scheduled task has triggered a merge.

[BrewTestBot]

:warning: Publish failed.

[BrewTestBot]

:robot: A scheduled task has triggered a merge.

[BrewTestBot]

:warning: Publish failed.

[BrewTestBot]

:robot: A scheduled task has triggered a merge.

[BrewTestBot]

:warning: Publish failed.