Fix APP_TYPE error in windows, close #2126

package.json

@@ -6,10 +6,10 @@
   "scripts": {
     "precommit": "npm run lint-staged",
     "presite": "npm run generate-mock && cd functions && npm install",
-    "start": "APP_TYPE=site umi dev",
+    "start": "cross-env APP_TYPE=site umi dev",
     "start:no-mock": "cross-env MOCK=none umi dev",
     "build": "umi build",
-    "site": "npm run presite &&APP_TYPE=site npm run build && firebase deploy",
+    "site": "npm run presite && cross-env APP_TYPE=site npm run build && firebase deploy",
     "analyze": "cross-env ANALYZE=1 umi build",
     "lint:style": "stylelint \"src/**/*.less\" --syntax less",
     "lint": "eslint --ext .js src mock tests && npm run lint:style",