Use npm-check-updates recursively to update Node modules and Bower components.

ncu-update-all.sh

cmd_exists() {
    command -v "$1" &> /dev/null
}

ncu-update-all(){

  if ! cmd_exists "ncu"; then
      printf "ncu is required, please install it!\n"
      exit 1
  fi

  for file in $(find . -type f -name "package.json" -not \( -path "*/node_modules/*" \) -not \( -path "*/bower_components/*" \)); do

    if [ -f "$file"  ]; then
      eval "ncu -a -u --packageFile $file"
    fi

  done

  for file in $(find . -type f -name "bower.json" -not \( -path "*/node_modules/*" \) -not \( -path "*/bower_components/*" \)); do

    if [ -f "$file"  ]; then
      eval "ncu -a -u -m bower --packageFile $file"
    fi

  done
}