please_pex-v3.0.0

• Upgrade pytest to 9.0.1 (#285)
  This adds support for Python 3.13 and 3.14 to the built-in pytest test runner.
• Implement run-time Python interpreter searching (#284)
  .pex files generated by please_pex are now prepended by a preamble binary rather than a shell
  script. This entirely removes the run-time dependency on /bin/sh and /usr/bin/env, but
  does mean that .pex files can now only be executed on the same platform on which they were
  built, even if they only contain pure Python.