Updated CI to use python 3.9

.gitlab-ci.yml

@@ -101,7 +101,7 @@ stages:
 release_build_master:
  stage: release_build
  image:
- name: nikolaik/python-nodejs:python3.8-nodejs10-alpine
+ name: nikolaik/python-nodejs:python3.9-nodejs10-alpine
  variables:
  NODE_ENV: "development"
  script:
@@ -147,7 +147,7 @@ release_build_develop:
  stage: release_build
  retry: 2
  image:
- name: nikolaik/python-nodejs:python3.8-nodejs10-alpine
+ name: nikolaik/python-nodejs:python3.9-nodejs10-alpine
  variables:
  NODE_ENV: "development"
  script: