Merge 70def2d into a45aa3b

Author: wokalski

.travis.yml

@@ -1,6 +1,7 @@
 sudo: false
 language: node_js
-node_js: stable
+node_js:
+    - '6'
 
 env:
   global:

package.json

@@ -23,7 +23,8 @@
     "build": "grunt default && gulp default",
     "lint": "eslint src/ && grunt lint && gulp lint",
     "testonly": "./resources/node_test.sh",
-    "test": "npm run lint && npm run testonly",
+    "test": "npm run lint && npm run testonly && npm run type-check",
+    "type-check": "cd type-definitions/tests && flow check",
     "perf": "node ./resources/bench.js",
     "start": "npm run build && node ./pages/resources/start.js",
     "deploy": "(cd ./pages/out && git init && git config user.name \"Travis CI\" && git config user.email \"github@fb.com\" && git add . && git commit -m \"Deploy to GitHub Pages\" && git push --force --quiet \"https://${GH_TOKEN}@github.com/facebook/immutable-js.git\" master:gh-pages > /dev/null 2>1)"
@@ -50,6 +51,7 @@
     "estraverse": "1.9.3",
     "express": "^4.13.4",
     "fbjs-scripts": "^0.5.0",
+    "flow-bin": "^0.36.0",
     "grunt": "0.4.5",
     "grunt-cli": "0.1.13",
     "grunt-contrib-clean": "0.7.0",