chore(deps): update dependency mypy to v1.20.0

Author: renovate[bot]

pyproject.toml

@@ -24,7 +24,7 @@ flake8-pytest-style = "2.2.0"
 ruff = "0.15.7"
 coverage = "7.13.5"
 black = "26.3.1"
-mypy = "1.19.1"
+mypy = "1.20.0"
 bandit = "1.9.4"
 xenon = "0.9.3"