npm-run-all
CLI for run multiple npm scripts in single npm script.
rimraf
CLI for running rm -rf on specific directory. This package is useful for writing a script for cleaning.
cross-env
CLI for adding environment variable temporarily for current command. For example, you want to use a env variable BUILD_STAGE of 'COMPRESSING', only for npm pack, you can use cross-env BUILD_STAGE=COMPRESSING npm pack