Bump mypy from 1.15.0 to 1.16.0 (#1092)

* Bump mypy from 1.15.0 to 1.16.0

Bumps [mypy](https://github.com/python/mypy) from 1.15.0 to 1.16.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.15.0...v1.16.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.16.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

* Update __init__.py

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sam Bull <[email protected]>

Author: dependabot[bot]

aiohttp_session/__init__.py

@@ -81,7 +81,7 @@ def new(self) -> bool:
         return self._new
 
     @property
-    def identity(self) -> Optional[Any]:  # type: ignore[misc]
+    def identity(self) -> Optional[Any]:
         return self._identity
 
     @property

requirements-dev.txt

@@ -5,7 +5,7 @@ flake8-bandit==4.1.1
 flake8-bugbear==24.12.12
 flake8-import-order==0.18.2
 flake8-requirements==2.2.1
-mypy==1.15.0
+mypy==1.16.0
 pep257==0.7.0
 pre-commit==4.2.0
 sphinx==8.2.3