Update gitlab configuration

.gitlab-ci.yml

@@ -10,7 +10,7 @@ cache:
 
 lint:
   stage: lint
-  image: node:12
+  image: node:latest
   before_script:
     - npm install
   script:
@@ -18,9 +18,8 @@ lint:
 
 syntax-test:
   stage: test
-  image: python:3.7
+  image: python:latest
   before_script:
     - pip install ansible --quiet
-    - ansible-galaxy install --role-file requirements.yml
   script:
     - ansible-playbook playbook.yml --syntax-check