Remove homebrew cocoapods installation in catalina, and install directly from gem, zsh version

fix_cocoapods_catalina.sh

#! /bin/zsh

install_cocoapods () {
    echo "Installing cocoapods with gem"
    # Creating new gems home if it doesnt't exist
    if [ ! -d "$HOME/.gem" ]; then
        mkdir "$HOME/.gem"
    fi

    # Adding to current session
    export GEM_HOME="$HOME/.gem"
    export PATH="$GEM_HOME/bin:$PATH"

    # Adding for future sessions
    if test -f "$HOME/.zshrc"; then
        echo 'Adding $GEM_HOME env var and then adding it to your $PATH'
        echo '' >> "$HOME/.zshrc"
        echo 'export GEM_HOME="$HOME/.gem"' >> "$HOME/.zshrc"
        echo 'export PATH="$GEM_HOME/bin:$PATH"' >> "$HOME/.zshrc"
    fi

    # Installing cocoapods
    gem install cocoapods
    which pod
    pod --version
}

uninstall_cocoapods_homebrew () {
    which -s brew
    if [[ $? != 0 ]] ; then
        echo "Homebrew not installed, skipping uninstalling cocoapods from homebrew"
    else
        brew uninstall cocoapods
    fi
}

if ! type "pod" > /dev/null; then
    echo "You don't have cocoapods installed..."    
else
    echo "Trying to uninstall it from homebrew first"
    uninstall_cocoapods_homebrew    
fi

install_cocoapods

it worked for me, thanks!