ADD(travis) stages

.travis.yml

@@ -1,18 +1,41 @@
 language:        node_js
 sudo:            required
+dist: trusty
 os:
   - linux
 node_js:
-  - "9.2.1"
+  - "10.6.0"
 
 before_install:
   - export CHROME_BIN=chromium-browser
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
-script:
-  - npm install --depth 0 --silent
-  - npm run lint
-  - npm run export
-  - travis_retry npm run test:export
-  - travis_retry npm run test:docs
-  - travis_retry npm run test:e2e
+
+stages:
+  - install
+  - format
+  - export
+  - tests
+
+jobs:
+  include:
+    - stage: install
+      script: travis_retry npm install --depth 0 --silent
+
+    - stage: format
+      script: travis_retry npm run lint
+      env: LABEL=lint
+
+    - stage: export
+      script: travis_retry npm run export
+      env: LABEL=export
+
+    - stage: tests
+      script: travis_retry npm run test:export
+      env: LABEL=test:export
+    - stage: tests
+      script: travis_retry npm run test:docs
+      env: LABEL=test:docs
+    - stage: tests
+      script: travis_retry npm run test:e2e
+      env: LABEL=test:e2e