lsst-pex-config v24.0.0 (2022-08-30)
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New Features
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* Add support for python typing of Fields. (DM-35312)
* ``loadFromStream`` now accepts a file-like object. (DM-32733)

Removals
--------

* The old ``root`` name in configuration files has been removed. (DM-32759)
* The Python2 iteration methods (``iterkeys``, etc) have been removed (DM-7148)

Other Changes
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* Attempting to pickle a proxy object now fails with a useful error message. (DM-33963)

lsst-pex-config v23.0.0 (2021-12-21)
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Other Changes
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* Internal data structures have been modified to aid Python reference counting. (DM-31507)

lsst-pex-config v22.0.0 (2021-07-09)
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Other Changes
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* Fix some issues with history handling. (DM-27519)

lsst-pex-config v21.0.0 (2020-12-08)
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New Features
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* Configuration objects can now be serialized to YAML. (DM-26008)

lsst-pex-config v20.0.0 (2020-06-24)
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New Features
------------

* ``__file__`` can now be accessed within a config file.
  This allow the config to acccess another config file relative to this one without having to use an environment variable or ``getPackageDir``. (DM-23359)

Bug Fixes
---------

* Freezing a config no longer affects other instances of that config. (DM-24435)

Other Changes
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* It is now possible to print a configuration without the associated imports. (DM-22301)

lsst-pex-config v19.0.0 (2019-12-05)
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New Features
------------

* Now released under a dual GPLv3 and 3-clause BSD license.
* Add support for deprecating configuration fields. Such fields are not written out. (DM-20378)
* ``pex_policy`` and ``daf_base`` are now optional dependencies, and the dependency on the LSST ``utils`` package in testing has been removed. (DM-21064)