Pex

* Fix dist-info metadata discovery. (1376)
* Fix `--platform` resolve handling of env markers. (1367)
* Fix `--no-manylinux`. (1365)
* Allow `--platform` resolves for current interpreter. (1364)
* Do not suppress pex output in bdist_pex (1358)
* Warn for PEX env vars unsupported by venv. (1354)
* Fix execution modes. (1353)
* Fix Pex emitting warnings about its Pip PEX venv. (1351)
* Support more verbose output for interpreter info. (1347)
* Fix typo in recipes.rst (1342)

This release brings a bugfix for macOS interpreters when the
MACOSX_DEPLOYMENT_TARGET sysconfig variable is numeric as well as a
fix that improves Pip execution environment isolation.

* Fix MACOSX_DEPLOYMENT_TARGET handling. (1338)
* Better isolate Pip. (1339)

This release brings a hotfix from kaos for interpreter identification
on macOS 11.

* Update interpreter.py (1332)

This release brings proper support for pyenv shim interpreter
identification as well as a bug fix for venv mode.

* Fix Pex venv mode to respect `--strip-pex-env`. (1329)
* Fix pyenv shim identification. (1325)

A hotfix that fixes a bug present since 2.1.25 that results in infinite
recursion in PEX runtime resolves when handling dependency cycles.

* Guard against cyclic dependency graphs. (1317)

A hotfix that finishes work started in 2.1.37 by 1304 to align Pip
based resolve results with `--pex-repository` based resolve results for
requirements with '.' in their names as allowed by PEP-503.

* Fix PEX direct requirements metadata. (1312)