Introduce .python-version to widen Python compatibility

Author: goncalossilva

.github/workflows/docs.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: pyproject.toml
+          python-version-file: .python-version
 
       - name: Set up uv
         uses: astral-sh/setup-uv@v5

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: pyproject.toml
+          python-version-file: .python-version
 
       - name: Set up uv
         uses: astral-sh/setup-uv@v5

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: pyproject.toml
+          python-version-file: .python-version
 
       - name: Set up uv
         uses: astral-sh/setup-uv@v5

.python-version

@@ -0,0 +1 @@
+3.13

pyproject.toml

@@ -3,7 +3,7 @@ name = "todoist_api_python"
 version = "3.0.0"
 description = "Official Python SDK for the Todoist API."
 authors = [{ name = "Doist Developers", email = "[email protected]" }]
-requires-python = "~=3.13"
+requires-python = "~=3.9"
 readme = "README.md"
 license = "MIT"
 keywords = ["todoist", "rest", "sync", "api", "python"]