Log Message:
py-ZopeTestrunner: updated to 5.5.1

5.5.1 (2022-09-07)
==================

- Fix: let ``--at-level=level`` with ``level <= 0`` run the tests
  at all levels (rather than at no level)

5.5 (2022-06-24)
================

- Use ``sys._current_frames`` (rather than ``threading.enumerate``)
  as base for new thread detection

- New option ``--gc-after-test``. It calls for a garbage collection
  after each test and can be used to track down ``ResourceWarning``s
  and cyclic garbage.
  With ``rv = gc.collect()``, ``!`` is output on verbosity level 1 when
  ``rv`` is non zero (i.e. when cyclic structures have been released),
  ``[``*rv*``]`` on higher verbosity levels and
  a detailed cyclic garbage analysis on verbosity level 4+.

- Allow the filename for the logging configuration to be specified
  via the envvar ``ZOPE_TESTRUNNER_LOG_INI``.
  If not defined, the configuration continues to be locked for
  in file ``log.ini`` of the current working directory.
  Remember the logging configuration file in envvar
  ``ZOPE_TESTRUNNER_LOG_INI`` to allow spawned child processes
  to recreate the logging configuration.