Pals

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- support psycopg3, backwards compatible with psycopg2 (thanks to petr.prikryl) (0139bea_)
- remove python 3.7 and 3.8 from CI, resolve flake8 issue (24bff1f_)

.. _0139bea: https://github.com/level12/pals/commit/0139bea
.. _24bff1f: https://github.com/level12/pals/commit/24bff1f

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- fix cursor usage after connection close (thanks to moser) (ded88e7_)

.. _ded88e7: https://github.com/level12/pals/commit/ded88e7

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- support SQLAlchemy 2.0 (6879081_)

.. _6879081: https://github.com/level12/pals/commit/6879081

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- add additional info to AcquireFailure exception (6d81db9_)

.. _6d81db9: https://github.com/level12/pals/commit/6d81db9

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- Support shared advisory locks (thanks to absalon-james) (ba2fe21_)

.. _ba2fe21: https://github.com/level12/pals/commit/ba2fe21

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- readme: update postgresql link (260bf75_)
- Handle case where a DB connection is returned to the pool which is already closed (5d730c9_)
- Fix a couple of typos in comments (da2b8af_)
- readme improvements (4efba90_)
- CI: fix coverage upload (52daa27_)
- Fix CI: bump CI python to v3.7 and postgres to v11 (23b3028_)

.. _260bf75: https://github.com/level12/pals/commit/260bf75
.. _5d730c9: https://github.com/level12/pals/commit/5d730c9
.. _da2b8af: https://github.com/level12/pals/commit/da2b8af
.. _4efba90: https://github.com/level12/pals/commit/4efba90
.. _52daa27: https://github.com/level12/pals/commit/52daa27
.. _23b3028: https://github.com/level12/pals/commit/23b3028