Add .gitlab-ci.yml file

.gitlab-ci.yml

+before_script:
+  - ruby -v
+  - which ruby
+  - sudo apt-get install libicu-dev -y
+  - gem install bundler --no-ri --no-rdoc
+  - bundle install
+
+rspec:
+  script:
+  - bundle exec rake test
+  tags:
+    - ruby
\ No newline at end of file