Update airmail-beta to 3.7.0.541,386 (#6796)
Update airmail-beta to 3.7.0.541,386 (#6796)


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