Update mysqlclient requirement from <2.2.1 to <2.2.4

[dependabot]

Updates the requirements on mysqlclient to permit the latest version.

Release notes

Sourced from mysqlclient's releases.

v2.2.3

What's Changed

• fix Connection.kill() broken since 2.2.2 by @​methane in PyMySQL/mysqlclient#696

Full Changelog: PyMySQL/mysqlclient@v2.2.2...v2.2.3

Changelog

Sourced from mysqlclient's changelog.

What's new in 2.2.3

Release: 2024-02-04

• Fix Connection.kill() method that broken in 2.2.2. (#689)

====================== What's new in 2.2.2

Release: 2024-02-04

• Support building with MySQL 8.3 (#688).
• Deprecate db.shutdown() and db.kill() methods in docstring. This is because mysql_shutdown() and mysql_kill() were removed in MySQL 8.3. They will emit DeprecationWarning in the future but not for now.

====================== What's new in 2.2.1

Release: 2023-12-13

• Connection.ping() avoid using MYSQL_OPT_RECONNECT option until reconnect=True is specified. MySQL 8.0.33 start showing warning when the option is used. (#664)
• Windows: Update MariaDB Connector/C to 3.3.8. (#665)
• Windows: Build wheels for Python 3.12 (#644)

====================== What's new in 2.2.0

Release: 2023-06-22

• Use pkg-config instead of mysql_config (#586)
• Raise ProgrammingError on -inf (#557)
• Raise IntegrityError for ER_BAD_NULL. (#579)
• Windows: Use MariaDB Connector/C 3.3.4 (#585)
• Use pkg-config instead of mysql_config (#586)
• Add collation option (#564)
• Drop Python 3.7 support (#593)
• Use pyproject.toml for build (#598)
• Add Cursor.mogrify (#477)
• Partial support of ssl_mode option with mariadbclient (#475)
• Discard remaining results without creating Python objects (#601)

... (truncated)

Commits

• 1fa31fd release 2.2.3 (#697)
• b34f8ef fix build issue introduced in 2.2.2 (#696)
• 7c199a9 release 2.2.2 (#693)
• ace8b25 deprecate APIs deprecated in MySQL 8
• 8b032d1 doc: add link to README (#692)
• 2570ad4 use ruff for formatter (#691)
• 720b804 Support MySQL 8.3 (#690)
• 9e3b00f chore(deps): update codecov/codecov-action action to v4 (#689)
• e2a908b update actions/cache action to v4 (#684)
• a2212b3 chore(deps): update actions/upload-artifact action to v4 (#681)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #166.