Release co-ordination for 2.8.1

Release 2.9.0 with improved support for PHP8 has been a little blocked by upstream fixes. In the meantime, we can release 2.8.1 with existing fixes.

• https://gitlab.com/DMore/chrome-mink-driver/-/compare/2.8.0...c6cac1f38e839fc259e554e57170da991c36567e
• !100 (merged) / !105 (merged) Fix clear console messages
• !109 (merged) / !109 (merged) Add homepage and support issues URLs
• !111 (merged) Non-optional arguments can not follow optional ones