Auto-deploy upon successful tagged commit (#112)

Author: thinkingserious

Diff for: .travis.yml

@@ -4,7 +4,11 @@ env:
 
 language: ruby
 rvm:
-- 2.2
+  - ruby-head
+  - 2.6
+  - 2.5
+  - 2.4
+  - jruby
 
 before_install:
 - gem install minitest
@@ -31,3 +35,12 @@ script:
 
 after_script:
   - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
+
+deploy:
+  provider: rubygems
+  api_key:
+    secure: CWlfN170i/fHPrIufHHLWQ0utjuhxf4ELSxKeypIuO2CNTqNMzocDAa2vxMt4XfO6d2wFPV/LC+IHR7i+sp7PKvjRoa4BLUUxjfBNDboc0gGESeUYlAxwsJo0tOVCNmpxgjQKqtPLz/19A/v/xpxLv2Im/9Idqa5ATd06sMDdM8=
+  gem: ruby-http-client
+  on:
+    tags: true
+    rvm: '2.4'