v5.4.3

• Fix: mob start and mob next now work on a wip branch whose base branch was never checked out locally, including base branch names that contain a -.
• Upgrade to go 1.27. On macOS, mob now requires macOS 13 Ventura or later.
• Improvement: every mob command runs faster in repositories with a long history.

Thank you, @ruben-carvalho, for fixing the base branch resolution.
Thank you, @hjwp, for reporting the mob next problem and pointing out the slow commit check.