Fix an issue that caused node-spawn-wrap failed to work on Windows,

Author: cheton

package.json

@@ -7,7 +7,7 @@
     "prepublish": "npm run lint && npm test && npm run build && npm run dist && npm run stylus && npm run build-examples && npm run release",
     "build": "babel --out-dir ./lib ./src",
     "build-examples": "cd examples; webpack",
-    "test": "tap test/*.js --coverage --nyc-arg=--require --nyc-arg=babel-register --nyc-arg=--require --nyc-arg=babel-polyfill",
+    "test": "tap test/*.js --node-arg=--require --node-arg=babel-register --node-arg=--require --node-arg=babel-polyfill",
     "dist": "webpack; BUILD_ENV=dist webpack",
     "release": "mkdir -p releases; cp -f dist/react-infinite-tree.css releases/react-infinite-tree-${npm_package_version}.css; cp -f dist/react-infinite-tree.js releases/react-infinite-tree-${npm_package_version}.js; cp -f dist/react-infinite-tree.min.js releases/react-infinite-tree-${npm_package_version}.min.js",
     "lint": "npm run eslint && npm run stylint",