0.5.10

• #452: Add the Imagick PHP extension by @victormacko
• #484: Add the XSL extension by @Kocal
• #494: Fix base64 encoding issue with some JSON responses by @jasonmccallister
• #490: New bref/build-php-72 and bref/build-php-73 Docker images by @mnapoli
  These images can be used to compile custom PHP extensions. The documentation to build custom extensions has been improved (even though it is still raw).