docs: update README (#234)

Author: HaydenOrz

README-zh_CN.md

@@ -44,6 +44,8 @@ dt-sql-parser 是一个基于 [ANTLR4](https://github.com/antlr/antlr4) 开发
 ## 与 MonacoEditor 集成
 我们提供了[monaco-sql-languages](https://github.com/DTStack/monaco-sql-languages)，通过它你可以轻易的将`dt-sql-parser`与`monaco-editor`集成。
 
+>提示：如果想要在浏览器中运行 `dt-sql-parser`，请不要忘记安装 `assert` 和 `util` 的 polyfills 包，另外还需要定义全局变量 `process.env`。 在 node 环境中则不需要，因为 node 内置了这些。
+
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 ## 安装

README.md

@@ -47,6 +47,9 @@ Additionally, it provides auxiliary functions such as **SQL splitting** and **co
 
 We have provided [monaco-sql-languages](https://github.com/DTStack/monaco-sql-languages), it is easily to integrate with `monaco-editor`.
 
+>Tips: If you want to run `dt-sql-parser` in browser, don't forget to install the `assert` and `util` polyfills, and define the global variable `process.env`.
+  None of this is needed in the node environment, because node has them built-in.
+
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 ## Installation