Tag please_pex v3.0.0

This is a new major version with two breaking changes:

- pytest has been upgraded from 7.4.2 to 9.0.1 in the built-in pytest
  test runner. There are breaking changes between these versions; see
  [pytest's changelog](https://docs.pytest.org/en/stable/changelog.html)
  for details.
- .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` for .pex files, 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.

Author: chrisnovakovic

tools/please_pex/ChangeLog

@@ -1,3 +1,13 @@
+Version 3.0.0
+-------------
+    * 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.
+
 Version 2.2.0
 -------------
     * Don't require a please_pex binary in order to build please_pex from source (#266)

tools/please_pex/VERSION

@@ -1 +1 @@
-2.2.0
+3.0.0