Update signal-beta from 1.30.0-beta.6 to 1.30.0-beta.7 (#8456)
Update signal-beta from 1.30.0-beta.6 to 1.30.0-beta.7 (#8456)


caskroom/homebrew-versions,rogeriopradoj/homebrew-versions,lantrix/homebrew-versions,pkq/homebrew-versions,caskroom/homebrew-versions,lantrix/homebrew-versions,rogeriopradoj/homebrew-versions,mahori/homebrew-cask-versions,404NetworkError/homebrew-versions,pkq/homebrew-versions,404NetworkError/homebrew-versions