GoReleaser regenerates each cask with a postflight block, which Homebrew rejects. A script now rewrites it to postflight_steps before test-bot runs. The four current casks are rewritten as well.
Homebrew rejects a postflight block with Cask/InstallSteps. The four casks now strip the quarantine attribute through postflight_steps. GoReleaser still generates the old block, so the next release of each project writes it back.