CI: Send CodeClimate test reports, deploy to RubyGems on tagging (#900)

.travis.yml

@@ -5,7 +5,11 @@ rvm:
   - 2.3
   - 2.4
   - 2.5
-  - 2.6
+  - ruby-head
+
+matrix:
+  fast_finish: true # do not wait for ruby-head to mark the build as finished
+  allow_failures:
     - ruby-head
 
 jobs:
@@ -14,16 +18,18 @@ jobs:
       rvm: ruby-2.4.1 # Pre-installed on TravisCI
       install: true # Do not bundle install
       script: gem install rubocop --no-document && rubocop
-
-stages:
-  - linting
-  - test
-
-branches:
-  only:
-    - master
-    - 0.1x
-
+    - stage: latest
+      rvm: 2.6 # Run custom before/after scripts for latest supported Ruby version.
+      before_script:
+        - curl -o ./cc-test-reporter -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64
+        - chmod +x ./cc-test-reporter
+        - ./cc-test-reporter before-build
+      after_script: ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
+    - stage: release
+      rvm: 2.6
+      install: true # Do not bundle install
+      script: skip
+      if: tag IS present
       deploy:
         provider: rubygems
         api_key:
@@ -32,4 +38,14 @@ deploy:
         on:
           tags: true
           repo: lostisland/faraday
-    rvm: 2.5
+
+stages:
+  - linting
+  - test
+  - latest
+  - release
+
+branches:
+  only:
+    - master
+    - 0.1x