update readme

Author: eilrix

README.md

@@ -12,6 +12,13 @@ npm i github-directory-downloader
 ```
 
 ## Usage
+
+#### CLI
+```sh
+github-directory-downloader https://github.com/mrdoob/three.js/tree/dev/docs/manual --dir=temp --token=******
+```
+#### Programmatic
+
 ```typescript
 import download from 'github-directory-downloader';
 import { resolve } from 'path';

bin/cli.js

@@ -1,3 +1,3 @@
 #!/usr/bin/env node
 
-require('../dist/cli')();
+require('../dist/cli').default();

package.json

@@ -1,6 +1,6 @@
 {
   "name": "github-directory-downloader",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Download just a sub directory from a GitHub repo",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",