some changes in cicd

.gitlab-ci.yml

-image: python:3.8-slim
+image: python:last
 
 # Change pip's cache directory to be inside the project directory since we can
 # only cache local items.
@@ -19,15 +19,23 @@ stages:
   python3 -m venv venv
   source venv/bin/activate
   pip install -U pip setuptools wheel setuptools_scm
-  pip install pytest flake8
+  pip install pytest
 
 
 test-python3.8:
     stage: test
+    image: python:3.8-slim
     script:
         - *virtualenv_definition
         - pytest ./tests/test_general.py
-        - flake8 .
+
+test-python3.9:
+    stage: test
+    image: python:3.9-slim
+    script:
+        - *virtualenv_definition
+        - pytest ./tests/test_general.py
+
 
 # before_script:
 #   - python -V               # Print out python version for debugging