Fix node env issue

.travis.yml

@@ -6,9 +6,6 @@ node_js:
 cache:
   directories:
   - node_modules
-env:
-  global:
-  - NODE_ENV=production
 install:
 - sudo apt-get update && sudo apt-get install -y libcairo2-dev libpango1.0-dev libssl-dev libjpeg62-dev libgif-dev pkg-config
 - npm install canvas
@@ -35,4 +32,3 @@ deploy:
   skip_cleanup: true
   email: $NPM_EMAIL
   api_key: $NPM_TOKEN
-  

package.json

@@ -11,7 +11,7 @@
     "i18n:src": "babel src > tmp.js && rimraf tmp.js && ./scripts/build-i18n-source.js ./translations/messages/ ./translations/",
     "lint": "eslint . --ext .js,.jsx",
     "start": "npm run i18n:msgs && webpack-dev-server",
-    "test": "npm run lint && npm run build && npm run unit",
+    "test": "npm run lint && npm run unit && NODE_ENV=production npm run build",
     "unit": "jest",
     "watch": "webpack --progress --colors --watch"
   },