$ brew install wp-cli
==> Downloading https://github.com/wp-cli/wp-cli/releases/download/v2.4.0/wp-cli
==> Downloading from https://github-production-release-asset-2e65be.s3.amazonaws
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🍺  /usr/local/Cellar/wp-cli/2.4.0: 3 files, 5.3MB, built in 4 seconds