FIX travis file

.travis.yml

@@ -1,9 +1,15 @@
 language: node_js
+os:
+  - linux
 node_js:
- - "node"
+  - "8"
 
-before_deploy:
-  - npm i
+before_install:
+  - export CHROME_BIN=chromium-browser
+  - export DISPLAY=:99.0
+  - sh -e /etc/init.d/xvfb start
+script:
+  - npm i --silent
   - npm run lint
   - npm test
   - npm export

package.json

@@ -16,7 +16,7 @@
     "start": "node build/dev-server.js",
     "pdf": "node node/app.js",
     "preview": "node node/preview.js",
-    "test": "concurrently \"npm run dev\" \"testcafe chrome test/\" --success first --kill-others --raw",
+    "test": "concurrently \"npm run dev\" \"testcafe chromium test/\" --success first --kill-others --raw",
     "template": "node node/template/template.js",
     "export": "concurrently \"npm run dev\" \"npm run pdf\" --success first --kill-others --raw",
     "lint": "eslint --ext .js,.vue src test/unit/specs test/e2e/specs"