Upgrade to Mypy v2

Changelog

@@ -2,6 +2,7 @@ Version 0.8.2     unreleased
 
 	* Add support for Python v3.15 and drop support for v3.11.
 	* Update dependencies and dependency pins across the board.
+	* Upgrade to MyPy v2, adjust for new strict settings, use native parser.
 	* Upgrade to Pytest v9 for new TOML syntax, strict mode, and Dependabot.
 	* Add support for Visual Studio Code as an IDE.
 	* Use pytest-cov for test coverage, for more consistency.

pyproject.toml

@@ -63,7 +63,7 @@ dev = [
    "pytest-testdox (>=3.1.0,<4.0.0)",
    "pytest-cov (>=7.1.0,<8.0.0)",
    "prek (>=0.5.3,<1.0.0)",
-   "mypy (>=1.6.0,<2.0.0)",
+   "mypy (>=2.3.1,<3.0.0)",
    "colorama (>=0.4.6,<1.0.0)",
    "types-pytz (>=2026.4.0.20260926)",
 ]
@@ -212,26 +212,27 @@ pretty = true
 show_absolute_path = true
 show_column_numbers = true
 show_error_codes = true
-# Settings equivalent to strict=true as of v1.17.1
+native_parser = true
+# Settings equivalent to strict=true as of v2.3.1
 check_untyped_defs = true
 disallow_any_generics = true
 disallow_incomplete_defs = true
 disallow_subclassing_any = true
 disallow_untyped_calls = true
-disallow_untyped_decorators = false
+disallow_untyped_decorators = true
 disallow_untyped_defs = true
 extra_checks = true
 no_implicit_reexport = true
 strict_equality = true
 warn_redundant_casts = true
 warn_return_any = true
-warn_unused_configs = true
 warn_unused_ignores = true
 # Additional settings above and beyond strict=true
 implicit_optional = false
 strict_optional = true
 warn_no_return = true
 warn_unreachable = true
+warn_unused_configs = true
 
 # It's hard to make tests compliant using unittest.mock
 [[tool.mypy.overrides]]