v4.2.0

• Feature: Add Promise v3 template types for all public functions.
  (#40 by @WyriHaximus and @clue)

  All our public APIs now use Promise v3 template types to guide IDEs and static
  analysis tools (like PHPStan), helping with proper type usage and improving
  code quality:

  assertType('bool', await(resolve(true)));
  assertType('PromiseInterface<bool>', async(fn(): bool => true)());
  assertType('PromiseInterface<bool>', coroutine(fn(): bool => true));

• Feature: Full PHP 8.3 compatibility.
  (#81 by @clue)

• Update test suite to avoid unhandled promise rejections.
  (#79 by @clue)