x-cmd: update livecheck

[botantony]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

Many x-cmd versions (0.5.7...0.5.10, 0.5.2, 0.4.12, and so on) are GitHub pre-releases which should be ignored by livecheck

[chenrui333]

Many x-cmd versions (0.5.7...0.5.10, 0.5.2, 0.4.12, and so on) are GitHub pre-releases which should be ignored by livecheck

maybe also worth asking the upstream about it (it is weird that all the most recent releases since 0.5.7 are pre-release)

[botantony]

closed in favor of #220130