Released reactphp/promise v3.2.0

[SimonFrings]

Released reactphp/promise v3.2.0 today 🎉

• Feature: Improve PHP 8.4+ support by avoiding implicitly nullable type declarations.
  (#260 by @Ayesh)

• Feature: Include previous exceptions when reporting unhandled promise rejections.
  (#262 by @clue)

• Update test suite to improve PHP 8.4+ support.
  (#261 by @SimonFrings)

– See https://github.com/reactphp/promise/releases/tag/v3.2.0