chore(cli): bump commander 5

packages/vant-cli/package.json

@@ -36,7 +36,6 @@
     "@types/fs-extra": "^8.1.0",
     "@types/lodash": "^4.14.149",
     "@types/postcss-load-config": "^2.0.1",
-    "@types/shelljs": "^0.8.6",
     "@types/webpack": "^4.41.7",
     "@types/webpack-dev-server": "^3.10.0",
     "@types/webpack-merge": "^4.1.5"
@@ -67,7 +66,7 @@
     "chokidar": "^3.3.1",
     "clean-css": "^4.2.3",
     "codecov": "^3.6.5",
-    "commander": "^4.1.1",
+    "commander": "^5.0.0",
     "consola": "^2.11.3",
     "conventional-changelog": "^3.1.18",
     "cross-env": "^7.0.2",
@@ -91,7 +90,6 @@
     "release-it": "^13.0.0",
     "sass": "^1.26.2",
     "sass-loader": "^8.0.2",
-    "shelljs": "^0.8.3",
     "style-loader": "^1.1.3",
     "stylelint": "^13.2.0",
     "typescript": "^3.8.3",