v1.4.0

• Feature: Support PHP 8.1, avoid deprecation warning concerning \Countable::count(...) return type.
  (#32 by @bartvanhoutte)

• Improve documentation and simplify examples by updating to new default loop.
  (#27 and #29 by @PaulRotmann and #30 by @SimonFrings)

• Improve test suite to use GitHub actions for continuous integration (CI).
  (#28 by @SimonFrings)