install according to https://brew.sh/index_ja
$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
$ brew bundle --global
$ brew bundle dump --global --force
$ zplug install
install according to https://github.com/junegunn/vim-plug
$ curl -fLo ~/.vim/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim