chore(deps): bump pytest, black, mypy, hypothesis with Py39 compat

Update dev dependencies to their latest versions while maintaining
Python 3.9 support via environment markers:

- pytest: 8.4.* -> 9.1.* (Py39 stays on 8.4.*)
- black: 25.* -> 26.* (Py39 stays on 25.*)
- mypy: 1.19.* -> 2.2.* (Py39 stays on 1.19.*)
- hypothesis: ~=6.0 -> ~=6.156 (Py39 gets ~=6.141)

All four packages dropped Python 3.9 support in their latest major
releases. This uses the same conditional pattern as openjd-cli.

Supersedes #300, #301, #302, #303.

Signed-off-by: Jericho Tolentino <68654047+jericht@users.noreply.github.com>

Author: jericht

requirements-testing.txt

@@ -1,15 +1,19 @@
 coverage[toml] == 7.*
-pytest == 8.4.*
+pytest == 9.1.*; python_version >= "3.10"
+pytest == 8.4.*; python_version < "3.10"
 pytest-cov == 7.1.*
 pytest-timeout == 2.4.*
 pytest-xdist == 3.8.*
 types-PyYAML ~= 6.0
-black == 25.*
+black == 26.*; python_version >= "3.10"
+black == 25.11.*; python_version < "3.10"
 ruff == 0.15.*
-mypy == 1.19.*
+mypy == 2.2.*; python_version >= "3.10"
+mypy == 1.19.*; python_version < "3.10"
 # pydantic: required by the legacy model_v0 (Pydantic) test suite,
 # which lives alongside the new Rust-backed model_v1 implementation.
 pydantic >= 2.10, < 3
 # hypothesis: used by the opt-in fuzz test suites in test/openjd/expr
 # and test/openjd/model-v*. conftest.py imports it unconditionally.
-hypothesis ~= 6.0
+hypothesis ~= 6.156; python_version >= "3.10"
+hypothesis ~= 6.141; python_version < "3.10"

src/openjd/expr/__init__.py

@@ -37,7 +37,6 @@
     HostContext,
 )
 
-
 # Note: the `__module__` / `__name__` / `__qualname__` of the Rust-backed
 # exceptions (ExpressionError, FormatStringValidationError, etc.) are set by
 # the `_openjd_rs` module init in Rust to their canonical user-facing values

src/openjd/model/_v1/__init__.py

@@ -66,7 +66,6 @@
 #   from openjd.model._v1 import template, job, types, errors
 from . import errors, job, template, types  # noqa: F401
 
-
 # ── Python-only types ──
 
 
@@ -92,7 +91,6 @@
 
 from .._version import version  # noqa: E402
 
-
 __all__ = (
     # Submodules
     "errors",

src/openjd/model/_v1/template.py

@@ -81,7 +81,6 @@
     HiddenOnlyUserInterface,
 )
 
-
 # Short aliases for ergonomics. Both names refer to the same class
 # object — ``Action is TemplateAction`` is True.
 Action = TemplateAction

test/openjd/expr/test_known_gaps.py

@@ -23,7 +23,6 @@
     SymbolTable,
 )
 
-
 # ── SymbolTable['Key'] = value when Key is already a subtable ──
 #
 # Reference (``_set_path`` with a single-component key):

test/openjd/expr/test_parsing.py

@@ -61,30 +61,24 @@ def test_leading_and_trailing_whitespace(self) -> None:
         assert evaluate_expression("  \t  3 * 4  \n").item() == 12
 
     def test_multiline_with_parens(self) -> None:
-        result = evaluate_expression(
-            """(
+        result = evaluate_expression("""(
             1 + 2 +
             3
-        )"""
-        )
+        )""")
         assert result.item() == 6
 
     def test_multiline_list(self) -> None:
-        result = evaluate_expression(
-            """[
+        result = evaluate_expression("""[
             1,
             2,
             3
-        ]"""
-        )
+        ]""")
         assert result.item() == [1, 2, 3]
 
     def test_multiline_conditional(self) -> None:
-        result = evaluate_expression(
-            """
+        result = evaluate_expression("""
             1 if True else 2
-        """
-        )
+        """)
         assert result.item() == 1
 
 

test/openjd/expr/test_pickle.py

@@ -32,7 +32,6 @@
     TypeCode,
 )
 
-
 # ── Group A: enums round-trip via variant name ───────────────────
 
 

test/openjd/expr/test_target_type_propagation.py

@@ -29,7 +29,6 @@
 
 from openjd.expr import ExprType, SymbolTable, TypeCode, evaluate_expression
 
-
 STRING = ExprType("string")
 LIST_INT = ExprType("list[int]")
 INT_OR_STRING = ExprType("int | string")

test/openjd/model_v0/conftest.py

@@ -29,7 +29,6 @@
 import os
 import sys
 
-
 _VAR = "OPENJD_MODEL_V0_TEST_IMPORT"
 _DEFAULT = "root"
 _CHOICES = ("root", "v0")

test/openjd/model_v0/test_step_param_space_iter_with_chunks.py

@@ -24,7 +24,6 @@
     divide_int_list_into_noncontiguous_chunks,
 )
 
-
 PARAMETRIZE_CASES: tuple = (
     pytest.param(
         RangeListTaskParameterDefinition_2023_09(