Bump webargs from 8.3.0 to 8.4.0

Bumps webargs from 8.3.0 to 8.4.0.

Changelog

8.4.0 (2024-01-07)

Features:

Add a new class attribute, empty_value to DelimitedList and DelimitedTuple, with a default of "". This controls the value deserialized when an empty string is seen.

empty_value can be used to handle types other than strings more gracefully, e.g.

.. code-block:: python
from webargs import fields
class IntList(fields.DelimitedList):
empty_value = 0
myfield = IntList(fields.Int())
.. note::
``empty_value`` will be changing in webargs v9.0 to be ``missing`` by
default. This will allow use of fields with ``load_default`` to specify
handling of the empty value.
The rule for default argument names has been made configurable by overriding the get_default_arg_name method. This is described in the argument passing documentation.

Other changes:

Drop support for Python 3.7, which is EOL.

Type annotations for FlaskParser have been improved.

Commits

920eb94 Bump version, update changelog, and update LICENSE
d80faff Fix name of GHA workflow
32a4cd4 Fix typing of handle_error
83ad0a8 Docs updates re: dropping 3.7
3a954d3 Update .pre-commit-config.yaml
9923f3a Update GHA and tox config for consistency with other marshmallow repos
e9316db Bump flake8 from 6.1.0 to 7.0.0
3ad15a0 Merge pull request #905 from marshmallow-code/dependabot/github_actions/actio...
2480108 Bump actions/setup-python from 4 to 5
ea1d9d6 [pre-commit.ci] pre-commit autoupdate (#898)
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marshmallow-code / flask-smorest

Bump webargs from 8.3.0 to 8.4.0 #594

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