Merge branch 'doc/readme' into 'dev'

Doc/readme

See merge request dt-insight-front/infrastructure/dt-sql-parser!9

README.md

@@ -1,12 +1,15 @@
 # dt-sql-parser
 
-[![NPM version][npm-image]][npm-url]
+[![NPM version][npm-image]][npm-url] [![NPM downloads][download-img]][download-url]
 
 English | [简体中文](./README-zh_CN.md)
 
 [npm-image]: https://img.shields.io/npm/v/dt-sql-parser.svg?style=flat-square
 [npm-url]: https://www.npmjs.com/package/dt-sql-parser
 
+[download-img]: https://img.shields.io/npm/dm/dt-sql-parser.svg?style=flat
+[download-url]: https://www.npmjs.com/package/dt-sql-parser
+
 dt-sql-parser is a **SQL Parser** project built with [ANTLR4](https://github.com/antlr/antlr4), and it's mainly for the **BigData** domain. The [ANTLR4](https://github.com/antlr/antlr4) generated the basic Parser, Visitor, and Listener, so it's easy to complete the **syntax validation**, **tokenizer**, **traverse** the AST, and so on features.
 
 Besides, it' provides some helper methods, like **split** SQL, and filter the `--` and `/**/` types of comments in SQL.

package.json

@@ -21,7 +21,7 @@
     "test": "jest"
   },
   "author": "dt-insight-front",
-  "license": "ISC",
+  "license": "MIT",
   "devDependencies": {
     "@types/jest": "^24.0.13",
     "@typescript-eslint/eslint-plugin": "^3.10.1",