Bump cherrypy from 18.8.0 to 18.9.0 (#2266)

* Bump cherrypy from 18.8.0 to 18.9.0

Bumps [cherrypy](https://github.com/cherrypy/cherrypy) from 18.8.0 to 18.9.0.
- [Changelog](https://github.com/cherrypy/cherrypy/blob/main/CHANGES.rst)
- [Commits](https://github.com/cherrypy/cherrypy/compare/v18.8.0...v18.9.0)

---
updated-dependencies:
- dependency-name: cherrypy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update cherrypy==18.9.0

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

[skip ci]

lib/pydantic/warnings.py

@@ -0,0 +1,58 @@
+"""Pydantic-specific warnings."""
+from __future__ import annotations as _annotations
+
+from .version import version_short
+
+__all__ = 'PydanticDeprecatedSince20', 'PydanticDeprecationWarning'
+
+
+class PydanticDeprecationWarning(DeprecationWarning):
+    """A Pydantic specific deprecation warning.
+
+    This warning is raised when using deprecated functionality in Pydantic. It provides information on when the
+    deprecation was introduced and the expected version in which the corresponding functionality will be removed.
+
+    Attributes:
+        message: Description of the warning.
+        since: Pydantic version in what the deprecation was introduced.
+        expected_removal: Pydantic version in what the corresponding functionality expected to be removed.
+    """
+
+    message: str
+    since: tuple[int, int]
+    expected_removal: tuple[int, int]
+
+    def __init__(
+        self, message: str, *args: object, since: tuple[int, int], expected_removal: tuple[int, int] | None = None
+    ) -> None:
+        super().__init__(message, *args)
+        self.message = message.rstrip('.')
+        self.since = since
+        self.expected_removal = expected_removal if expected_removal is not None else (since[0] + 1, 0)
+
+    def __str__(self) -> str:
+        message = (
+            f'{self.message}. Deprecated in Pydantic V{self.since[0]}.{self.since[1]}'
+            f' to be removed in V{self.expected_removal[0]}.{self.expected_removal[1]}.'
+        )
+        if self.since == (2, 0):
+            message += f' See Pydantic V2 Migration Guide at https://errors.pydantic.dev/{version_short()}/migration/'
+        return message
+
+
+class PydanticDeprecatedSince20(PydanticDeprecationWarning):
+    """A specific `PydanticDeprecationWarning` subclass defining functionality deprecated since Pydantic 2.0."""
+
+    def __init__(self, message: str, *args: object) -> None:
+        super().__init__(message, *args, since=(2, 0), expected_removal=(3, 0))
+
+
+class PydanticDeprecatedSince26(PydanticDeprecationWarning):
+    """A specific `PydanticDeprecationWarning` subclass defining functionality deprecated since Pydantic 2.6."""
+
+    def __init__(self, message: str, *args: object) -> None:
+        super().__init__(message, *args, since=(2, 0), expected_removal=(3, 0))
+
+
+class GenericBeforeBaseModelWarning(Warning):
+    pass