TOX: Update environment list to match CI targets

Author: effigies

tox.ini

@@ -2,9 +2,15 @@
 requires =
   tox>=4
 envlist =
-  py38-{none,min,full}
-  py3{9,10}-full
-  py3{11,12}-{none,pre,full}
+  # No preinstallations
+  py3{8,9,10,11,12}-none
+  # Minimum Python
+  py38-{min,full}
+  # x86 support range
+  py3{9,10,11}-{full,pre}-{x86,x64}
+  py3{9,10,11}-pre-{x86,x64}
+  # x64-only range
+  py312-{full,pre}-x64
   doctest
   style
   typecheck
@@ -27,6 +33,7 @@ DEPENDS =
 
 ARCH =
   x64: x64
+  x86: x86
 
 CHECK =
   build: build