dom: add new dev function

package.json

 {
   "private": true,
   "scripts": {
-    "dev": "umi dev",
+    "dev": "PAGES_PATH='Exception500/src' umi dev",
     "lint:style": "stylelint \"src/**/*.less\" --syntax less",
     "lint": "eslint --ext .js src mock tests && npm run lint:style",
     "lint:fix": "eslint --fix --ext .js src mock tests && npm run lint:style",
     "lint-staged": "lint-staged",
     "lint-staged:js": "eslint --ext .js",
-    "prettier": "node ./_scripts/prettier.js"
+    "prettier": "node ./_scripts/prettier.jsy"
   },
   "devDependencies": {
     "@types/classnames": "^2.2.7",
@@ -29,7 +29,7 @@
     "stylelint-config-prettier": "^4.0.0",
     "stylelint-config-standard": "^18.0.0",
     "umi": "^2.3.0-0",
-    "umi-plugin-block-dev": "^1.0.0",
+    "umi-plugin-block-dev": "^1.3.1",
     "umi-plugin-react": "^1.3.0-0"
   },
   "lint-staged": {