tests: Split up into separate jobs

scripts/supported_py_versions.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+import json
+from itertools import count
+from pathlib import Path
+from typing import Generator
+
+import tomli
+from packaging.specifiers import SpecifierSet
+from packaging.version import Version
+
+
+def get_python_versions() -> Generator[str, None, None]:
+    """Get all python versions this package is compatible with."""
+    with Path("pyproject.toml").open("rb") as f:
+        pyproject_data = tomli.load(f)
+
+    specifier = SpecifierSet(pyproject_data["tool"]["poetry"]["dependencies"]["python"])
+
+    below_spec = True
+    for v_minor in count():
+        version = Version(f"3.{v_minor}")
+
+        # in specifier: yield
+        if version in specifier:
+            below_spec = False
+            yield str(version)
+            continue
+
+        # below specifier: skip
+        if below_spec:
+            continue
+
+        # above specifier: return
+        return
+
+
+print(json.dumps(list(get_python_versions())))