Require no flow warnings

Author: leebyron

package.json

@@ -22,7 +22,7 @@
     "test": "npm run lint && npm run check && npm run testonly",
     "test:ci": "npm run lint && npm run check && npm run testonly:coveralls",
     "lint": "eslint src",
-    "check": "flow check",
+    "check": "flow check --max-warnings 0",
     "build": "babel src --ignore src/__tests__ --out-dir dist/ ; cp src/index.js dist/index.js.flow ; cp src/index.d.ts dist/",
     "watch": "babel resources/watch.js | node",
     "testonly": "jest src",