chore: Define py314 environments

Author: effigies

tox.ini

@@ -13,6 +13,8 @@ envlist =
   py39-min
   # Run full and pre dependencies against all archs
   py3{9,10,11,12,13,13t}-{full,pre}-{x86,x64,arm64}
+  # Python development versions
+  py3{14,14t}-pre-{x64,arm64}
   install
   doctest
   style
@@ -28,6 +30,8 @@ python =
   3.12: py312
   3.13: py313
   3.13t: py313t
+  3.14: py314
+  3.14t: py314t
 
 [gh-actions:env]
 DEPENDS =
@@ -66,7 +70,7 @@ set_env =
   pre: PIP_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
   pre: UV_INDEX=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
   pre: UV_INDEX_STRATEGY=unsafe-best-match
-  py313t: PYTHONGIL={env:PYTHONGIL:0}
+  py3{13,14}t: PYTHONGIL={env:PYTHONGIL:0}
 extras =
   test