New release of Torrust-Axum tracker, now renamed to Torrust-Actix for switching to a different web framework. All the changes will be pointed here.

• Bumped library versions.
• Modified the way scheduling was done through threads, it could lock up and slow down public trackers with heavy activity.
• Tweaking the SQLite3 database usage and database space consumption.
• Full overhaul on how torrents and peers are used in memory. Using crossbeam skipmap for thread safe non-locking memory sharing.
• Some various improvement on coding performance, readability and linting the files.
• Replaced Tokio Axum web framework for Actix, reason: Missing critical things like a timeout on connect, disconnect, read and write, and support was lackluster.
• Renamed the github repository from torrust-axum to torrust-actix.
• Adding user tracking support with an extra key.