cd $(brew –prefix)/Homebrew/Library/Taps/homebrew/homebrew-core/Formula
git log –follow icu4c.rb
git checkout -b icu4c-63.1 bc0c97952453ff6afc146aa3a706e9902aba4300
brew reinstall ./icu4c.rb
cd $(brew –prefix)/Homebrew/Library/Taps/homebrew/homebrew-core/Formula
git log –follow icu4c.rb
git checkout -b icu4c-63.1 bc0c97952453ff6afc146aa3a706e9902aba4300
brew reinstall ./icu4c.rb