test: fix jest with less import (#24900)

.jest.js

@@ -25,6 +25,7 @@ module.exports = {
     '^react-dnd-touch-backend$': 'react-dnd-touch-backend/dist/cjs',
     '^react-dnd-test-backend$': 'react-dnd-test-backend/dist/cjs',
     '^react-dnd-test-utils$': 'react-dnd-test-utils/dist/cjs',
+    '\\.(css|less)$': 'identity-obj-proxy',
   },
   testPathIgnorePatterns: ['/node_modules/', 'dekko', 'node', 'image.test.js'],
   transform: {

package.json

@@ -147,7 +147,6 @@
     "warning": "^4.0.3"
   },
   "devDependencies": {
-    "rc-virtual-list": "^1.1.0",
     "@ant-design/bisheng-plugin": "^2.3.0",
     "@ant-design/colors": "^4.0.0",
     "@ant-design/hitu": "^0.0.0-alpha.13",
@@ -209,6 +208,7 @@
     "glob": "^7.1.4",
     "http-server": "^0.12.0",
     "husky": "^4.0.3",
+    "identity-obj-proxy": "^3.0.0",
     "ignore-emit-webpack-plugin": "^2.0.2",
     "immutability-helper": "^3.0.0",
     "inquirer": "^7.1.0",
@@ -235,6 +235,7 @@
     "rc-queue-anim": "^1.6.12",
     "rc-scroll-anim": "^2.5.8",
     "rc-tween-one": "^2.4.1",
+    "rc-virtual-list": "^1.1.0",
     "react": "^16.9.0",
     "react-color": "^2.17.3",
     "react-copy-to-clipboard": "^5.0.1",