fix(esbuild): run npm version check as postinstall (#2500)

Author: mattem

packages/esbuild/package.json

@@ -13,5 +13,8 @@
   },
   "keywords": [
     "bazel"
-  ]
+  ],
+  "scripts": {
+    "postinstall": "node npm_version_check.js"
+  }
 }