automating the install of pulsar-client and pulsar-client-dev

Another package I use (node-sass) downloads and builds its native dependencies automatically.
It does this by using npm's install and post install hooks: https://github.com/sass/node-sass/blob/887199a28fbed12f18dfecbfa5495aa5d48b2d4e/package.json#L31
their install script: https://github.com/sass/node-sass/blob/master/scripts/install.js
their postinstall script: https://github.com/sass/node-sass/blob/master/scripts/build.js

automating the install of pulsar-client and pulsar-client-dev would make it much easier to use this library.

首先检查此仓库的 package.json 及其当前的原生依赖安装路径，然后将它们与 issue 中链接的 node-sass install.js 和 build.js 示例进行比较。当安装 Node 包能够在不执行 issue 所描述的手动步骤的情况下自动安装或构建 pulsar-client 和 pulsar-client-dev 时，这项工作就完成了。

由索引模型根据 Issue 内容生成。