Fix NO_PROXY in windows, ref #181

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "precommit": "npm run lint-staged",
     "start": "roadhog server",
-    "start:no-proxy": "NO_PROXY=true roadhog server",
+    "start:no-proxy": "cross-env NO_PROXY=true roadhog server",
     "build": "roadhog build",
     "site": "roadhog-api-doc static && gh-pages -d dist",
     "analyze": "roadhog build --analyze",
@@ -50,6 +50,7 @@
     "babel-plugin-transform-runtime": "^6.9.0",
     "babel-preset-env": "^1.6.1",
     "babel-preset-react": "^6.24.1",
+    "cross-env": "^5.1.1",
     "cross-port-killer": "^1.0.1",
     "enzyme": "^3.1.0",
     "enzyme-adapter-react-16": "^1.0.2",