add in Ruby

ci/ruby.properties.json

@@ -0,0 +1,6 @@
+{
+    "name": "Ruby",
+    "description": "Build and test a Ruby project with Rake.",
+    "iconName": "ruby",
+    "category": "Ruby"
+}

ci/ruby.yml

@@ -0,0 +1,19 @@
+name: Ruby
+on: [push]
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    actions:
+
+    - name: Set up Ruby 2.6
+      uses: actions/setup-ruby@master
+       with:
+        version: 2.6.x
+
+    - name: Build and test with Rake
+      run: |
+        gem install bundler
+        bundle install --jobs 4 --retry 3
+        bundle exec rake