update script for windows

Author: trusktr

package.json

@@ -52,7 +52,7 @@
     "test:integration": "npm run jest -- --selectProjects integration",
     "test:unit": "npm run jest -- --selectProjects unit",
     "test": "npm run jest && run-s test:e2e",
-    "jest": "NODE_OPTIONS=--experimental-vm-modules jest",
+    "jest": "cross-env NODE_OPTIONS=--experimental-vm-modules jest",
     "watch:css": "npm run css -- -o themes -w",
     "watch:js": "node build/build.js"
   },