fixed gitlab yaml file for eslint runner

.gitlab-ci.yml

@@ -27,7 +27,7 @@ lint-server:
 lint-client:
   stage: test
   script:
-    - npm install eslint eslint-plugin-prettier prettier babel-eslint
+    - npm install eslint eslint-plugin-prettier prettier babel-eslint eslint-plugin-requirejs
     - cd src/client
     - ../../node_modules/.bin/eslint .
   only:
@@ -67,4 +67,4 @@ build-image-stable:
     - docker push $IMAGE_TAG_REF
     - docker push $IMAGE_TAG_ALIAS
   only:
-    - tags    
+    - tags