* configure isort to add the future annotations import
* apply the new isort setting
* remove type ignores for new mypy (#13539)
https://pypi.org/project/mypy/0.981/
* another
* Remove mempool.additions
* Don't re run the program, and remove program from mempool item
* Removals only stores item ids, and stores a list
* Move pending cache down to prevent cache dos
* Separate validation from adding to pool, and remove mypy exceptions
* Fix bug with replacing
* Add to mypy
* Revert cbgui
* precommit fail
* Properly update the seen dict
* lint error
* Fix mempool bug
* Update after merge with main
* Address comments
* fix issue where the cost of the mempool TX cache (for spend bundles that can't be included in a block yet) would not be reset when the cache was emptied
* factor out the Pending TX cache from mempool, to allow unit testing