v0.5.0

Imported release from original tag date 2021-11-30.

• Feature / BC break: Simplify App by always using default loop, drop optional loop instance.
  (#88 by @clue)

  // old
  $loop = React\EventLoop\Loop::get();
  $app = new FrameworkX\App($loop); 
  
  // new (already supported before)
  $app = new FrameworkX\App();

• Add documentation for manual restart of systemd service and chapter for Caddy deployment.
  (#87 by @SimonFrings and #82 by @francislavoie)

• Improve documentation, remove leftover $loop references and fix typos.
  (#72 by @shuvroroy, #80 by @Ivanshamir, #81 by @clue and #83 by @rattuscz)