Log Message:
py-pyrsistent: updated to 0.20.0

0.20.0, 2023-10-25
* Fix 245, never introduce new nodes during discard.
* Fix 268, do not rely on well implemented __ne__ for keys in pmaps, instead do \ 
explicit inversion of equality
  comparison when checking for inequality.
* Officially support Python 3.12.
* Officially drop support for Python 3.7.
* Fix 273, build more types of wheels. Thanks @jams2 for this!
* Fix 282, add generic types to types. Thanks @lukasK9999 for this!
* Fix 281, defaultdict can now be frozen. NB! This is a backwards incompatible \ 
fix since defaultdict was not
  previously frozen.