chore(cli): downgrade postcss@7

packages/vant-cli/package.json

@@ -49,7 +49,7 @@
     "@vant/eslint-config": "^3.0.0",
     "@vant/markdown-loader": "^3.0.1",
     "@vant/markdown-vetur": "^2.0.2",
-    "@vant/stylelint-config": "^1.3.0",
+    "@vant/stylelint-config": "^1.4.0",
     "@vant/touch-emulator": "^1.2.0",
     "@vue/babel-plugin-jsx": "^1.0.0-rc.3",
     "@vue/test-utils": "2.0.0-beta.10",
@@ -65,13 +65,13 @@
     "consola": "^2.15.0",
     "conventional-changelog": "^3.1.24",
     "cross-env": "^7.0.2",
-    "css-loader": "^5.0.1",
+    "css-loader": "^4.0.0",
     "eslint": "^7.14.0",
     "fast-glob": "^3.2.4",
     "fork-ts-checker-webpack-plugin": "^6.0.3",
     "gh-pages": "^3.1.0",
     "hash-sum": "^2.0.0",
-    "html-webpack-plugin": "^5.0.0-alpha.6",
+    "html-webpack-plugin": "^5.0.0-alpha.14",
     "husky": "^4.3.0",
     "jest": "^26.6.3",
     "jest-canvas-mock": "^2.3.0",
@@ -82,7 +82,7 @@
     "lodash": "^4.17.20",
     "ora": "^5.1.0",
     "portfinder": "^1.0.28",
-    "postcss": "^8.1.8",
+    "postcss": "^7.0.0",
     "postcss-load-config": "^3.0.0",
     "postcss-loader": "^4.1.0",
     "prettier": "^2.2.0",

packages/vant-cli/src/config/jest.config.ts

@@ -19,7 +19,7 @@ const DEFAULT_CONFIG = {
     '\\.(js|jsx|ts|tsx)$': 'babel-jest',
   },
   transformIgnorePatterns: ['/node_modules/(?!(@vant/cli))/'],
-  snapshotSerializers: ['jest-serializer-vue'],
+  snapshotSerializers: ['jest-serializer-html'],
   collectCoverage: true,
   collectCoverageFrom: [
     'src/**/*.{js,jsx,ts,tsx,vue}',