Prepare the 2.1.122 release. (pex-tool#2055)

Closes pex-tool#2040

CHANGES.rst

@@ -1,6 +1,24 @@
 Release Notes
 =============
 
+2.1.122
+-------
+
+This release fixes posix file locks used by Pex internally and enhances
+lock creation to support locking sdist-only C extension projects that
+do not build on the current platform. Pex is also updated to support
+`--pip-version 22.3.1` and `--pip-version 23.0`, bringing it up to date
+with the latest Pip's available.
+
+* Support the latest Pip releases: 22.3.1 & 23.0 (#2056)
+  `PR #2053 <https://github.com/pantsbuild/pex/pull/2056>`_
+
+* Lock sdists with ``prepare-metadata-for-build-wheel``. (#2053)
+  `PR #2053 <https://github.com/pantsbuild/pex/pull/2053>`_
+
+* Fix ``execute_parallel`` "leaking" a thread. (#2052)
+  `PR #2052 <https://github.com/pantsbuild/pex/pull/2052>`_
+
 2.1.121
 -------
 

pex/version.py

@@ -1,4 +1,4 @@
 # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-__version__ = "2.1.121"
+__version__ = "2.1.122"