Aligned Travis configuration after switching to Yarn. See...

Aligned Travis configuration after switching to Yarn. See https://github.com/ckeditor/ckeditor5/issues/1214.

.travis.yml

@@ -4,28 +4,29 @@ addons:
   firefox: latest
   apt:
     sources:
-    - google-chrome
+      - google-chrome
     packages:
-    - google-chrome-stable
+      - google-chrome-stable
 language: node_js
 node_js:
-- '8'
+  - '8'
 cache:
-- node_modules
+  yarn: true
 branches:
   except:
-  - stable
+    - stable
 before_install:
-- export DISPLAY=:99.0
-- sh -e /etc/init.d/xvfb start
-- npm config set package-lock false
-- npm i -g npm@^5.7.1
+  - 'export DISPLAY=:99.0'
+  - sh -e /etc/init.d/xvfb start
+  - npm i -g yarn
 install:
-- npm install @ckeditor/ckeditor5-dev-tests
-- ckeditor5-dev-tests-install-dependencies
+  - yarn add @ckeditor/ckeditor5-dev-tests
+  - ckeditor5-dev-tests-install-dependencies
 script:
-- ckeditor5-dev-tests-travis
+  - ckeditor5-dev-tests-travis
+after_success:
+  - ckeditor5-dev-tests-save-revision
 env:
   global:
-  - secure: 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
-  - secure: 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
+    - secure: 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
+    - secure: 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