rewind: update url and add uninstall items

[zyoshoka]

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 any changes to a cask, existing or new, verify:

• The submission is for a stable version or documented exception.
• brew audit --cask --online <cask> is error-free.
• 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 (add your cask's name to the end of the search field).
• brew audit --cask --new <cask> worked successfully.
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• brew uninstall --cask <cask> worked successfully.

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I updated both of url and livecheck's url since they return 404. The changelog doesn't seem to have been updated and unfortunately I couldn't find any other way than extract_plist.

[bevanjkay]

@zyoshoka How long has the 404 been present? The app is still checking the appcast for new versions, so it may be a temporary issue.

[zyoshoka]

As far as I know, it returns 404 since just a few days ago, but I thought it needed fix since the download URL was also unavailable.