chore: add Node.js 10

Summary: Closes https://github.com/facebook/Sonar/pull/100

Differential Revision: D8618047

Pulled By: danielbuechele

fbshipit-source-id: 12215bcbd12a9afef88de3d4979931481ff2e7d9

.travis.yml

@@ -29,6 +29,22 @@ matrix:
           keep-history: true
           on:
             branch: master
+    - language: node_js
+      node_js:
+        - "10"
+
+      install:
+        - yarn
+        - cd website
+        - yarn
+        - cd ..
+
+      script:
+        - yarn lint
+        - yarn build --mac --version=$TRAVIS_BUILD_NUMBER
+        - cd website
+        - yarn build
+        - cd ..
 
     - language: objective-c