* Dynamically generate build matrix for all supported SQLAlchemy versions

* Fix formatting

* Fix old style assertEquals

* Remove unused import

* Add session tags for filtering

* Add tests

* Fix pypy warnings

* Fail on warnings from within the project

* Add pointer to noxfile help

* Fix formatting

* Fix expression precedence

* Update formatting

* Consume all descendants on deletion

* Use posargs as a substitute

* Remove unused import

* Suppress health check

* Remove given from invariant

* Optimize test rules

* Add copyright notice

* Update copyright notice

* Revert suppress

* Add pre-commit configuration

* Add flake8 to pre-commit hooks

* Fix tests for SQLAlchemy 1.4

* Disable coverage by default for PyPy

* Suppress coverage reporting for tests that don't run for all versions

* Remove bespoke WeakSet implementation

* Ignore coverage for tests

* Unify after_flush_postexec execution path for CPython & PyPy

* Remove redundant execution paths

* Remove individual coverage skip for test

* Add docstring

* Keep existing tests while also run the failing tests to observe future behavior

* Add release notes

* Drop tests for PyPy

* Simplify test invocation logic

* Update docstring

* Validate toml files

* Disable sqla 1.4 warnings for now

* Refine docstring

* Validate toml files

* Revert toml-sort checks

* Remove PyPy helper logic

* Revert formatting change

* Update changelog

* Remove warning suppression

* Show all SQLA 2.x warnings

* Add compatibility layer for legacy SQLA versions

* Address warnings

* Add copyright notice

* Refactor version detection logic

* Enable doctest

* Add doctest

* Test all of Usage documentation

* Use a separate session for doctest

* Test all of Setup documentation

* Use the right type

* Segregate test and doctest installs

* Only match test sessions

* Update release notes

* Fix typo

* Add doctest for README

* Add sphinx-build instructions

* Revert doctest changes for README as it was not displayed correctly on Github

* Update install instructions

* Add doctests for flask-sqlalchemy docs

* Simplify title

* Add doctests

* Fix formatting

* Hide setup code

* Document the :hide: hack

* Fix typo

* Remove redundant imports

* Log request operations

* Fix build matrix generation output