2.4.0

Merged

• Bump actions/cache from 2.1.7 to 3 #39
• Bump actions/cache from 2.1.6 to 2.1.7 #38

Commits

• ci: Update workflows. 109d0eb
• refactor: Update minor things. 14bdb91
• chore: Align static files. 06bf12c
• docs: Update documentation. 0ecd91e
• refactor: Update for Symfony >= 5.4. fa5b2dc
• chore: Remove docker stuff, replace with .envrc. 2eb1f48
• chore: Update licence holder. 99130b7
• chore: Normalize composer.json. f93945f