[hoangchunghien]

Closes: #16448

stubtest failed on the stubsabot bump with three errors. Each comes from a change in peewee 4.5.3:

• Database.get_views is new on the base class (it raises NotImplementedError). The SQLite, MySQL and Postgres overrides were already in the stub, so the base gets the same signature.
• Function.subquery_functions is a new class attribute, a set of function names, next to no_coerce_functions.
• ModelSelect.exists now overrides SelectBase.exists, wrapped with @database_required. That decorator injects the database argument, so it goes in the allowlist with the other @database_required methods.

stubtest for peewee 4.5.3, mypy_test.py stubs/peewee, pyright_test.py stubs/peewee, black and flake8 all pass locally.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉