v0.1.5

• Allow rasuvaeff/understudy ^0.6. Widened rather than raised: the adapter
  works against every 0.x line it has ever supported, and consumers on the
  older ones should not be cut off from it.
• The shipped trait's docblock taught the usage this package documents as
  wrong. It stubbed find(7) with when() and claimed the same call with
  expect() — two registrations of one call, which the engine refuses — and
  it armed the expectation below the action, where it counts zero. llms.txt
  carried the same snippet. Both now show the corrected form the README and
  examples/readme-usage.php have used since 0.1.0, and both name the two
  engine rules that decide it. Fixes #13.
• DocumentedUsageTest pins the three copies of the Usage snippet to each
  other. The original mistake survived two releases because nothing ran the
  snippet; the fix reached the README and the runnable example and stopped
  there, at the two copies nothing executes — which a consumer reads in their
  IDE and an assistant reads as llms.txt.