oh my zsh syntax plugins

setup.sh

#!/bin/zsh

# install auto suggestions
git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions

# install syntax highlighting
git clone https://github.com/zsh-users/zsh-syntax-highlighting.git
echo "source ${(q-)PWD}/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh" >> ${ZDOTDIR:-$HOME}/.zshrc

sed -z --regexp-extended 's/(plugins=\(.*)\)/\1\tzsh-autosuggestions\n\tzs-syntax-highlighting\n)/g' ~/.zshrc