chore: fix npm to yarn in contributing.md and package.json (#3274)

* chore: fix npm to yarn in contributing.md

* chore: fix npm pack to yarn pack

src/packages/utils/package.json

@@ -57,6 +57,6 @@
   "scripts": {
     "build:umd": "cross-env NODE_ENV=production webpack --config webpack.prod.config.js",
     "build:umd:withAnalyzer": "cross-env NODE_ENV=production ANALYZER=true webpack --config webpack.prod.config.js",
-    "pack": "yarn build:umd && npm pack"
+    "pack": "yarn build:umd && yarn pack"
   }
 }