v0.4.1

• Requires rasuvaeff/understudy ^0.9 || ^0.10. The engine's 0.10 closes six
  defects of the 1.0 review, the widest of them being that an optional
  parameter no longer has to be spelled in a specification: when(fn () => $repository->find(1)) now matches a contract whose remaining parameters
  carry defaults, and an unspelled position is rendered as … in reports so
  it is never mistaken for a written any(). Nothing this adapter does changes
  — the arity suppression it carries is about Arg::rest(), which still
  covers the contract's required parameters and only those.
• Drops the ^0.8 term, as 0.4.0 said it would in the release that
  follows the engine's.
• Moves the Pest fixture's path-repository pins with the release, as this
  package's own rule requires: the engine to 0.10.0, this package to
  0.4.1, and the fixture's requirement to ^0.4. A path repository is
  canonical, so a stale pin does not fall back to Packagist — left alone,
  ^0.8 would have kept the README's recipe resolvable and never once run
  it against 0.10.