[CI]: Add python test on different python version (#219)

* ci: add test on different python versions

* fix: use List replace list in type hint

.github/workflows/python-tests.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
     name: Lint
     steps:
       - name: Check out source repository

python/aibrix/aibrix/envs.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import os
-from typing import Optional
+from typing import List, Optional
 
 ENV_VARS_TRUE_VALUES = {"1", "ON", "YES", "TRUE"}
 
@@ -24,7 +24,7 @@ def _is_true(value: Optional[str]) -> bool:
     return value.upper() in ENV_VARS_TRUE_VALUES
 
 
-def _parse_list_str(value: Optional[str], sep: str = ",") -> Optional[list[str]]:
+def _parse_list_str(value: Optional[str], sep: str = ",") -> Optional[List[str]]:
     if value is None:
         return None
     return [str(item).strip() for item in value.split(sep)]