Bump mypy dependency to 2.0.0.

Align static type-checker versioning with the mypy 2 baseline for consistent behavior across local and CI runs.

Author: adamtheturtle

pyproject.toml

@@ -47,7 +47,7 @@ optional-dependencies.dev = [
     "freezegun==1.5.5",
     "furo==2025.12.19",
     "interrogate==1.7.0",
-    "mypy[faster-cache]==1.20.2",
+    "mypy[faster-cache]==2.0.0",
     "mypy-strict-kwargs==2026.1.12",
     "prek==0.3.13",
     "pydocstringformatter==0.7.5",