Aldine 1.19.0

Upgrade Notice

• Aldine 1.19.0 requires Pressbooks >= 6.9.0 and PHP >= 8.1

Minor Changes

• Require PHP 8.1: #399
• Use required workflow for build & lint CI checks: #396

Dependencies

• Bump dependencies: #387, #388, #389, #391, #394, #395, #400, #401