Run CI test against Node.js 6 and 10

.travis.yml

@@ -1,19 +1,30 @@
 language: node_js
-node_js:
-  - "6.9.2"
 dist: trusty
-before_install:
-  - git submodule update --init --recursive
-  - git fetch origin master:refs/remotes/origin/master --depth=1
 addons:
   chrome: stable
-install:
-  - npm install
-
-script:
-  - npm run ci
-
 notifications:
   email:
     on_success: never
     on_failure: change
+
+jobs:
+  include:
+    - node_js:
+        - "6.9.2"
+      before_install:
+        - git submodule update --init --recursive
+        - git fetch origin master:refs/remotes/origin/master --depth=1
+      install:
+        - npm install
+      script:
+        - npm run ci
+    - node_js:
+        - "10"
+      before_install:
+        - git submodule update --init --recursive
+        - git fetch origin master:refs/remotes/origin/master --depth=1
+        - rm npm-shrinkwrap.json
+      install:
+        - npm ci
+      script:
+        - npm run ci