Install Event Calendar Pro

Installs The Event Calendar and Event Calendar Pro and activates license.

wp plugin install the-events-calendar --force --activate
wp plugin install "https://pue.tri.be/api/plugins/v2/download?plugin=events-calendar-pro&key=<replace-with-pro-license-key>" --force --activate

Make sure you replace <replace-with-pro-license-key> with a valid Event Calendar Pro license key.