Update iterm2-beta from 3.4.0beta2 to 3.4.0beta3 (#9444)
Update iterm2-beta from 3.4.0beta2 to 3.4.0beta3 (#9444)

* Update iterm2-beta from 3.4.0beta2 to 3.4.0beta3

* Update iterm2-beta.rb

Co-authored-by: Vítor Galvão <59bd0a3ff43b32849b319e645d4798d8a5d1e889@vitorgalvao.com>
pkq/homebrew-versions,404NetworkError/homebrew-versions,404NetworkError/homebrew-versions,pkq/homebrew-versions,caskroom/homebrew-versions,caskroom/homebrew-versions,mahori/homebrew-cask-versions