Flake8-bugbear

* Add B033: Detect duplicate items in sets
* Add B908: Detect assertRauses like contexts only has top level statements that could throw
* Add B028: Allow stacklevel to be explicitly assigned as a positional argument
* Remove more < 3.8 checks / assertions

* flake8-bugbear is now >= 3.8.1 project like flake8>=6.0.0
* This has allowed some more modern AST usage cleanup and less CI running etc.
* B030: Fix crash on certain unusual except handlers (e.g. ``except a[0].b:``)

* B950: now ignores 'noqa' and 'type: ignore' comments.
* B005: Do not flag when using the ``strip()`` method on an imported module.
* B030: Allow calls and starred expressions in except handlers.

* B906: Add ``visit_Bytes``, ``visit_Num`` and ``visit_Str`` to the list of ``visit_*``
functions that are ignored by the B906 check. The ``ast.Bytes``, ``ast.Num`` and
``ast.Str`` nodes are all deprecated, but may still be used by some codebases in
order to maintain backwards compatibility with Python 3.7.
* B016: Warn when raising f-strings.
* Add B028: Check for an explicit stacklevel keyword argument on the warn method from the warnings module.
* Add B029: Check when trying to use ``except`` with an empty tuple i.e. ``except: ()``.
* Add B032: Check for possible unintentional type annotations instead of assignments.

* B024: now ignores classes without any methods. (336)
* B017: Don't warn when ``pytest.raises()`` has a ``match`` argument. (334)
* B906: Ignore ``visit_`` functions with a ``_fields`` attribute that can't contain ast.AST subnodes. (330)

* Rename B028 to B907, making it optional/opinionated.