Use 3.13 in dev

.python-version-default

@@ -1 +1 @@
-3.12
+3.13

tox.ini

@@ -26,7 +26,7 @@ commands =
     mypy: mypy tests/typing_example.py
     mypy: mypy src/attrs/__init__.pyi src/attr/__init__.pyi src/attr/_typing_compat.pyi src/attr/_version_info.pyi src/attr/converters.pyi src/attr/exceptions.pyi src/attr/filters.pyi src/attr/setters.pyi src/attr/validators.pyi
 
-[testenv:py3{8,10,12}-tests]
+[testenv:py3{8,10,13}-tests]
 extras = cov
 # Python 3.6+ has a number of compile-time warnings on invalid string escapes.
 # PYTHONWARNINGS=d makes them visible during the tox run.
@@ -39,9 +39,9 @@ commands = coverage run -m pytest {posargs:-n auto --dist loadfile}
 
 [testenv:coverage-report]
 # Keep base_python in-sync with .python-version-default
-base_python = py312
+base_python = py313
 # Keep depends in-sync with testenv above that has cov extra.
-depends = py3{8,10,12}
+depends = py3{8,10,13}-tests
 skip_install = true
 deps = coverage[toml]>=5.3
 commands =
@@ -97,7 +97,7 @@ commands = cog -rP README.md docs/index.md
 
 [testenv:pre-commit]
 skip_install = true
-deps = pre-commit
+deps = pre-commit-uv
 commands = pre-commit run --all-files