Update mypy requirement from <1.5,>=1.0 to >=1.0,<1.9

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.0.0...v1.8.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
...

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

pyproject.toml

@@ -32,7 +32,7 @@ Changelog = "https://github.com/allenai/python-package-template/blob/main/CHANGE
 [project.optional-dependencies]
 dev = [
     "ruff",
-    "mypy>=1.0,<1.5",
+    "mypy>=1.0,<1.9",
     "black>=23.0,<24.0",
     "isort>=5.12,<5.13",
     "pytest",