Update mypy requirement from <1.5,>=1.0 to >=1.0,<1.6 (#249)

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Commits](python/mypy@v1.0.0...v1.5.0)

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

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pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "ruff",
-    "mypy>=1.0,<1.5",
+    "mypy>=1.0,<1.6",
     "types-requests",
     "types-cachetools",
     "types-PyYAML",