add file to auto test

Author: gletort

.github/workflows/cross-platform.yml

@@ -0,0 +1,44 @@
+name: Cross-Platform Tests
+
+  ## activate tests when change the version, or a test
+on:
+  push:
+    #branches: [main]
+    paths:
+      - 'pyproject.toml'
+      - 'tox.ini'
+      - 'requirements*.txt'
+      - '.github/workflows/cross-platform.yml'
+
+on:
+  push:
+    branches:
+      - main
+      - release/**     # release/1.0, release/2.x, etc.
+    tags:
+      - 'v*'           # v1.0, v2.3.1, etc.
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install tox
+        run: pip install tox tox-gh-actions
+
+      - name: Run tox
+        run: tox

tox.ini

@@ -1,13 +1,13 @@
 # For more information about tox, see https://tox.readthedocs.io/en/latest/
 [tox]
-envlist = py{39,310,311}-{linux,macos,windows}
+envlist = py{310,311,312}-{linux,macos,windows}
 isolated_build=true
 
 [gh-actions]
 python =
-    3.9: py39
     3.10: py310
 	3.11: py311
+	3.12: py312
 
 [gh-actions:env]
 PLATFORM =