Merge branch 'ruby23' into 'master'

Ruby 2.3



See merge request !2

.gitlab-ci.yml

@@ -1,6 +1,18 @@
+image: ruby:2.3
+
+test:
+  stage: test
+  script:
+  - gem install jekyll
+  - jekyll build -d test
+  artifacts:
+    paths:
+    - test
+  except:
+  - master
+
 pages:
   stage: deploy
-  image: ruby:2.1
   script:
   - gem install jekyll
   - jekyll build -d public