docs: add quick usage in readme Close #95

Author: joolfe

README.md

@@ -10,21 +10,25 @@ Or in other words, transform [this specification](https://schema.getpostman.com/
 [![codecov](https://codecov.io/gh/joolfe/postman-to-openapi/branch/master/graph/badge.svg)](https://codecov.io/gh/joolfe/postman-to-openapi)
 [![npm version](https://img.shields.io/npm/v/postman-to-openapi
 )](https://www.npmjs.com/package/postman-to-openapi)
-[![dcos](https://img.shields.io/badge/docs-here-yellow)](https://joolfe.github.io/postman-to-openapi/)
+[![docs](https://img.shields.io/badge/docs-here-yellow)](https://joolfe.github.io/postman-to-openapi/)
 
 ## Installation
 
 Using `npm`:
 
-`npm i postman-to-openapi`
+```bash
+npm i postman-to-openapi
+```
 
 Using `yarn`:
 
-`yarn add postman-to-openapi`
+```bash
+yarn add postman-to-openapi
+```
 
 ## Quick Usage
 
-```
+```js
 // Require Package
 const postmanToOpenApi = require('postman-to-openapi')
 
@@ -33,30 +37,24 @@ const postmanCollection = './path/to/postman/collection.json'
 // Output OpenAPI Path
 const outputFile = './api/collection.yml'
 
-// Convert Postman collection to OpenAPI using Async/Await
-const collectionToOpenAPI = async () => {
-    try {
-        const result = await postmanToOpenApi(postmanCollection, outputFile, { defaultTag: 'General' })
-        // Without save the result in a file
-        const result2 = await postmanToOpenApi(postmanCollection, null, { defaultTag: 'General' })
+// Async/await
+try {
+    const result = await postmanToOpenApi(postmanCollection, outputFile, { defaultTag: 'General' })
+    // Without save the result in a file
+    const result2 = await postmanToOpenApi(postmanCollection, null, { defaultTag: 'General' })
+    console.log(`OpenAPI specs: ${result}`)
+} catch (err) {
+    console.log(err)
+}
+
+// Promise callback style
+postmanToOpenApi(postmanCollection, outputFile, { defaultTag: 'General' })
+    .then(result => {
         console.log(`OpenAPI specs: ${result}`)
-    } catch (err) {
+    })
+    .catch(err => {
         console.log(err)
-    }
-}
-collectionToOpenAPI();
-
-// Convert Postman collection to OpenAPI using Promise Callback
-const collectionToOpenAPI = async () => {
-    postmanToOpenApi(postmanCollection, outputFile, { defaultTag: 'General' })
-        .then(result => {
-            console.log(`OpenAPI specs: ${result}`)
-        })
-        .catch(err => {
-            console.log(err)
-        })
-}
-collectionToOpenAPI();
+    })
 ```
 
 ## Documentation

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "postman-to-openapi",
-  "version": "1.7.0",
+  "version": "1.7.1",
   "description": "Convert postman collection to OpenAPI spec",
   "main": "lib/index.js",
   "scripts": {