PhpWiki 1.6.0 released

This is a major release of PhpWiki:

• PHP 7 and 8 compatible (works from PHP 5.3.3 to PHP 8.0)
• Full HTML 5: Add HTML 5 <main> <header> <footer> <nav> in all themes. Add ARIA roles.

See ReleaseNotes for the complete list of improvements.