New features

[5467857] Swap Markdown package from erusev to league (@94noni) [59d1811] Use PHP 8 attributes to configure Command (@94noni) [58d2a52] Upgrade symfony/flex to v2.0.1 (@94noni) [12b2992] Update code to use the latest Node.js 16 LTS version (@fabpot) [cf5e12d][8e8d63c] Add various comments in the codebase (@94noni) [43404e8] Run tests on PHP 8.1 too (@rosier)

Bug fixes

[2aa5be7] Remove unused parameter (@rosier) [e202561] Move JavaScript entry function in the HTML head (@94noni) [407a301] Fix an exception in CommentType (@rosier) [378f8a5] Fix translator parameters (@94noni)