Depend on python>=3.10 and add tox to test across versions

pyproject.toml

@@ -6,15 +6,15 @@ authors = [
 version = "0.1.0"
 description = "A code editing widget for PyQt and PySide"
 readme = "README.md"
-requires-python = ">=3.12"
+requires-python = ">=3.10"
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
 ]
 dependencies = [
     "pygments>=2.18.0",
-    "pyside6>=6.7.2",
+    "pyside6>=6.2.0",
     "qtpy>=2.4.1",
 ]
 
@@ -27,6 +27,7 @@ dev-dependencies = [
     "pytest>=8.3.3",
     "pytest-qt>=4.4.0",
     "ruff>=0.6.7",
+    "tox>=4.21.2",
 ]
 
 [build-system]

tox.ini

@@ -0,0 +1,16 @@
+[tox]
+env_list =
+    py312
+    py311
+    py310
+minversion = 4.21.2
+
+[testenv]
+description = run the tests with pytest
+package = wheel
+wheel_build_env = .pkg
+deps =
+    pytest>=6
+    pytest-qt>=4
+commands =
+    pytest {tty:--color=yes} {posargs}