Third-party license notices

The WordPress.org artifact bundles one third-party runtime component:

Freemius WordPress SDK
  Path:    vendor/freemius/wordpress-sdk/
  License: GNU General Public License v3.0 (GPL-compatible; full text in
           vendor/freemius/wordpress-sdk/LICENSE.txt)
  Source:  https://github.com/Freemius/wordpress-sdk
  Purpose: licensing, upgrade handling, and the WordPress.org-compliant
           opt-in flow disclosed in readme.txt.

No other third-party runtime code is bundled. All remaining code in this
package is Carticy first-party code licensed under GPL-2.0-or-later (see
license.txt). Development-only dependencies declared in the repository's
Composer/npm metadata are excluded from the WordPress.org artifact by the
release build (bin/dist-manifest.php ship list).
